Abstract: A camper-boat construction having a camper body adapted for carriage on a pick-up truck bed, the underside of the body being commensurate dimensionally with the bed. The body has hinged at the edges of its underside elongated panels that have a fold-up or retracted position wherein they may be pivoted flush against the body sides for carriage in the truck and a fold-down or extended position wherein they may be pivoted to and supported at a horizontal position to form a deck area contiguous to the sides and ends of the body. Wheeled struts are adjustably supported to the sides of the body and are lowered during removal of the body from the bed. Pontoons carried on the camper body top are attachable to the underside of the panels in the fold-down position for buoyantly supporting the body.