Scouter Hugh McVeigh in Germnantown Tennessee has designed a handsome, functional variation called the Kamp Kitchen. He first built them with his sons (both Eagle Scouts) and has built around 100 to date including some for the 1993 National Jamboree. See more pictures and read about the project at Chuck Box Kitchen.
Instructables-CamperBox. If you want to build your own Camper in a Box, IamWe on Instructables has a step by step plan that can be completed with basic tools. The plans feature a bed and small kitchen unit with spaces for a stove, propane and cooking gear. There is extra storage space for two folding chairs and a folding table, a foldable bed mattress and a 12 volt DIY refrigerator and 12 volt power unit. The lid of the box can be folded down and used as a kitchen table or food prep space.