A caravan can look perfectly level in the driveway, yet feel unsettled the moment a B-double passes on the highway or the road turns to corrugations. That is why a proper caravan weight distribution guide starts well before departure. It is about knowing what every load does to your tow vehicle, your caravan and the way the complete rig behaves when the country gets rough.
For Australian touring, weight is not a paperwork exercise. It affects braking, steering, tyre wear, suspension travel and your margin for error on long sealed runs, sandy tracks and remote roads. Get it right and your caravan follows faithfully. Get it wrong and even a well-built off-road caravan can become difficult to control.
Start with the numbers that matter
Before shifting a single camp chair or filling a water tank, understand the ratings for both the caravan and tow vehicle. These figures are set by the manufacturer and must not be exceeded, regardless of what a mate's similar-looking rig weighs.
ATM, or Aggregate Trailer Mass, is the maximum permitted weight of the caravan when it is not attached to the tow vehicle. It includes the caravan itself, water, gas, food, recovery gear, batteries, accessories and every item packed inside.
GTM, or Gross Trailer Mass, is the maximum weight carried by the caravan wheels and axles when coupled. The difference between ATM and GTM is generally the tow ball mass, but always check the compliance plate and handbook for your specific van.
Your tow vehicle has its own limits. These commonly include GVM, which is the vehicle's maximum loaded weight; GCM, the maximum combined weight of vehicle and caravan; maximum braked towing capacity; and maximum tow ball download. A tow rating alone is not enough. It is entirely possible to be under the advertised towing capacity while exceeding GVM, GCM or the rear axle rating.
The practical answer is a public weighbridge. Weigh the tow vehicle fully loaded as it travels, then weigh the caravan coupled and uncoupled. If you tour with bikes, a second spare wheel, a full fridge and 150 litres of water, weigh it that way. Empty showroom weights do not reflect a real trip to the Cape, the Kimberley or the High Country.
Caravan weight distribution guide: where to pack heavy gear
The strongest loading principle is simple: keep heavy items low, close to the caravan axle group and centred from side to side. This reduces leverage on the chassis and helps the caravan remain stable when it meets bumps, cambers and sudden steering inputs.
Heavy recovery gear, tools, tinned food and spare parts belong in low storage spaces near the axle line where practical. Lighter, bulkier gear such as bedding, camp chairs and clothes can go in overhead lockers or further towards the ends of the van. Avoid loading all heavy gear into the front tunnel boot simply because it is convenient. A loaded generator, jerry cans, toolbox and two gas bottles can add significant weight forward of the axles and quickly push tow ball mass beyond the safe limit.
The rear of a caravan deserves the same caution. Bikes, a spare wheel carrier, firewood or a storage box mounted behind the axle can create a pendulum effect. Every kilogram placed a long way from the axle has more influence than the same kilogram placed close to it. Rear-mounted accessories may also reduce ball weight, which can make a caravan more prone to sway.
Aim for a balanced load rather than chasing one magic percentage. Tow ball mass is often discussed as a proportion of caravan weight, but the right result depends on the caravan design, its ratings, the tow vehicle and the way it is loaded. Your figures must remain within every applicable limit. If they do not, move the load, remove non-essential gear or reassess the accessories fitted to the rig.
Water, fuel and food change the equation
Water is one of the biggest variables in an off-grid setup. One litre weighs approximately one kilogram, so a full water tank can materially change axle loads and ball weight. The location of each tank matters just as much as its capacity.
If tanks sit ahead of the axle group, filling them may increase ball weight. If they sit behind it, the opposite may occur. Check your van's layout, then weigh the rig with the tank combination you expect to carry. On a weekend away, you may only need enough water for the destination. For remote travel, full tanks may be non-negotiable, so the rest of the load needs to be planned around them.
Food, drinks and an extra freezer can have a similar effect over a long trip. Recheck your loading as supplies change. A caravan that is balanced when leaving home may not be balanced after a big shop in a regional town.
Set up the tow vehicle as part of the system
A caravan and tow vehicle work as one unit. Loading the caravan correctly will not solve a ute or SUV that is overloaded in the rear.
Keep dense gear in the vehicle low and as far forward as practical, without compromising passenger comfort or safety. A heavy fridge slide, drawers, recovery gear and a full canopy can already place substantial load behind the rear axle. Add a caravan's ball weight and the rear axle may reach its limit well before the vehicle reaches its GVM.
Check the towbar, hitch, rated recovery points and electrical connections are suitable for the load. Tyres should be in good condition, correctly rated and inflated to pressures appropriate for the load and terrain. Manufacturer recommendations are the starting point. Pressure changes for gravel or sand should be made thoughtfully, with speed reduced to match the conditions.
Weight distribution hitches can help restore front axle load and improve steering feel on suitable highway touring combinations. They are not a cure for an overloaded or poorly balanced rig. They may also be unsuitable for some off-road couplings, suspension systems or rough tracks. Follow the caravan and vehicle manufacturer guidance, and remove or adjust the system where required before heading into uneven terrain.
Know the warning signs before they become dangerous
Poor distribution is often felt before it is measured. A steering wheel that feels light, excessive pitching, repeated trailer sway, harsh bottoming-out, uneven tyre wear or a caravan that reacts sharply to passing trucks all deserve attention.
Do not try to drive through instability by accelerating. If sway develops, hold the steering wheel steady, ease off the accelerator smoothly and allow the rig to slow in a controlled way. Avoid sharp steering, sudden braking or aggressive corrections. Once safely stopped, inspect the load, tyre pressures, coupling and any obvious changes in the caravan's stance.
A level-looking caravan is useful, but it is not proof of correct loading. Scales are the only reliable way to confirm actual masses. For travellers fitting accessories over time, regular weigh-ins are smart ownership. Solar upgrades, extra batteries, stone protection, bike racks and a bigger fridge all improve capability, but every addition uses part of the available payload.
Build your loading routine before every trip
The best touring setups are repeatable. Keep commonly carried gear in known locations, record your measured weights and leave a buffer rather than loading right to the maximum. That buffer gives you room for groceries, a full tank, muddy recovery gear and the unexpected items every long trip collects.
Before departure, check that cupboards are latched, loose gear is secured, the breakaway system is operational and the caravan is coupled correctly. Confirm your mirrors provide a clear view down both sides of the van, then take the first few kilometres calmly. Listen for rattles, feel how the rig brakes and make adjustments before the road gets faster or rougher.
Cub Campers are built for Australians who want to take the comfortable route beyond the bitumen, but capable construction does not replace careful preparation. Load with purpose, weigh the whole combination and respect every rating. Then you can spend less time fighting the steering wheel and more time enjoying the country ahead.