An apparatus for loading a camper-insert, or other large-volume load, onto the bed of a pickup truck comprises a stiff-leg frame for supporting the load from the ground, the frame preventing the load from applying weight to the tail end of the bed with damaging consequences while the load is being cantilevered into position over the frame by the draw of a winch and cable system. The apparatus uses at least one telescoping leg to lift the rear of the load as part of a novel hoist assembly, which dynamically braces the telescoping leg on a foot while providing minimal interference to nesting the camper-insert closely to the host surfaces.