NADA Guides has a manufacturer name of [Lance] for truck campers and another of [Lance Camper Manufacturing (Lance Manufacturing)] for travel trailers. You need to select the correct manufacturer name based on the type of recreational vehicle value you are trying to find.
Lance began manufacturing travel trailers in 2010. They range in length from 16 foot to 28 foot trailers. The company was founded in 1966 and is based out of California. They are well known for their long established line of truck campers.