There are various truck campers manufacturers.
Extensive List of truck campers manufacturers and some example models
Palomino Truck Campers vary in function. The Palomino Bronco is a small lightweight truck camper for shorter trips. The Palomino Maverick is for lengthier trips away from home, and you could practically live out of the Palomino Winter Creek. This company is known for its excellence in the fold-a-wall design for camping trailers, but those trailers are not quite as compact as truck campers.