The size question seems simple: bigger is better, right? Not necessarily. A bigger caravan means more living space, but it also means more weight (requiring a bigger tow vehicle), more fuel consumption, higher purchase price, and less access to smaller campgrounds, national park sites, and remote tracks. The caravan that’s perfect for a couple spending 12 months on sealed highways is completely wrong for a family of five who wants to explore the Gibb River Road. Size is a trade-off, and getting it right starts with understanding what you actually need versus what looks appealing in a showroom.
Bigger means more space. It also means more fuel, more weight, and fewer places you can go.
Size Categories
Compact (14 to 17 feet / 4.2 to 5.2m): Light, easy to tow, fits in tight spaces. Typically suits a couple or solo traveller. Limited storage, smaller kitchen and bathroom (or no bathroom). ATM usually 1,200 to 1,800kg. Can be towed by most mid-size SUVs. Goes almost anywhere a conventional caravan can go.
Mid-size (17 to 20 feet / 5.2 to 6.1m): The sweet spot for couples on a long trip. Full kitchen, ensuite bathroom, comfortable bed, reasonable storage. ATM typically 1,800 to 2,500kg. Fits most caravan park sites and many national park campgrounds. Requires a mid-to-large SUV or ute to tow safely.
Full-size (20 to 23 feet / 6.1 to 7m): Standard for families and couples who want spacious living. Full facilities, good storage, separate living areas. ATM typically 2,500 to 3,200kg. Requires a large SUV or ute. Won’t fit some national park sites and tight caravan parks.
Large (23+ feet / 7m+): Maximum space and comfort. Often includes slide-outs, washing machine, and premium features. ATM typically 3,000 to 3,500kg+. Requires a serious tow vehicle. Restricted from many campgrounds, national parks, and all unsealed remote tracks. Best suited to sealed-road touring with extended caravan park stays.
How Many People?
Solo or couple: A 17 to 20 foot van is the sweet spot. Enough space to live comfortably long-term without being oversized for the roads and campsites you’ll encounter. A 17-foot van feels cosy but manageable. A 20-foot van feels spacious for two people.
Couple with 1 to 2 kids: 19 to 22 feet. You need bunk space, more storage for kids’ gear and education materials, and a layout that lets adults and children occupy different areas of the van simultaneously (even if that just means a curtain between bunks and the main bedroom).
Family with 3+ kids: 21 to 24 feet. Triple bunks or bunk plus conversion options require length. The trade-off is significant: a van this size limits your campsite options and demands a powerful tow vehicle.
Where Are You Going?
Sealed roads only (Highway 1 loop, coastal towns): Any size works. Full-size and large caravans are comfortable for this style of travel because the roads and most caravan parks accommodate them.
Mix of sealed and gravel (including popular outback routes): Mid-size preferred. Shorter vans handle corrugations, narrow roads, and tighter turns better. A 20-foot semi off-road van covers 90% of Australia’s accessible roads.
Remote tracks and serious off-road: Compact to mid-size maximum. The Gibb River Road, the Savannah Way, Cape York tracks, and similar routes have tight turns, rough surfaces, water crossings, and limited campsite space. A van over 20 feet is impractical or impossible on many of these routes.
The most common regret among Big Lappers isn’t buying too small; it’s buying too big. A van that’s comfortable in the showroom can feel unwieldy on a single-lane outback road or impossible to fit into the campsite everyone else is raving about. When in doubt, go smaller. You’ll adapt to the space quickly and appreciate the access.
The Real-World Test
Before buying, visit a caravan park and look at the sites. Walk the rows. Notice which vans fit comfortably and which are squeezed in. Drive through a national park campground and look at the site dimensions. Check WikiCamps for campsite size restrictions at the places you plan to visit. This real-world observation does more to calibrate your size expectations than any amount of showroom browsing.
The showroom doesn’t have maximum vehicle length signs. Campgrounds do.
- 17 to 20 feet is the sweet spot for couples. 19 to 22 feet for small families. 21 to 24 feet for large families.
- Your route determines your maximum practical size. Outback and off-road travel demands smaller vans.
- Bigger means more space but also more weight, more fuel, higher cost, and fewer campsite options.
- The most common regret is buying too big. When in doubt, go smaller and enjoy the access.
- Visit real campgrounds and check WikiCamps size restrictions before committing to a size.
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