Yes, You Can Make a Utility Trailer Camper to Sleep Your 8 Kids. Wow, It’s Even Got a Bunk Bed. By DoItYourselfRV Builds, Popular, Trailers Many DIY RVs built on a utility trailer are about the size of tear drop campers. But not this one. Built on a 6′ by 16′ trailer, this camper sleeps 8+