A camper is a small shelter carried in the back of a truck.

VOA: special.2010.02.02

Briton Mark Prior, who is travelling from Alaska to Brazil ( also the name of their blog) in a camper truck with his wife Sarah, said they have also found people to be refreshingly welcoming.

BBC: Camping through Mexico and Central America

Their truck, an old beater, had a camper on the back that was trimmed with weathered wooden two-by-fours, decorated in coarse carvings of trout.

FORBES: Catskills Fly Fishing Book