Most can be towed by an average size vehicle. See the License Class chart. The larger one is built on a truck chassis with a gasoline or diesel engine and is capable of traveling long distances due to a large fuel capacity. The smaller or mini-motor home is built on a modified van chassis and usually has a section that overhangs the cab. See the License Class chart.
Vehicles usually have a raised roof for additional headroom.
A van conversion normally has a bed, dinette, sink, and a small water supply but is not as fully equipped for camping as a van camper. See the License Class chart. The larger varieties may require trucks with dual-rear wheels. Also called pickup camper or cab over camper. See the License Class chart.