Abstract: A cover for use with a conventional pickup truck having a tiltable tailgate upon which is mounted a conventional rigid camper enclosure of the type having a tiltable rear window panel and being accessible from the rear. The cover includes a flexible waterproof canvas sheet having a forward edge attached by a series of spaced snaps around the top and sides of the camper assembly at the rear end thereof, the sheet extending over and around the window panel and tailgate when in their rearwardly extending open positions. The sheet contains a vertically extending slit for rear access to the camper enclosure and one or more window openings. Flexible insect screens are positioned in registry with the window openings and contain cloth borders which are attached to the rear exterior surface of the sheet around the openings.