The super camper special was the only camper special with the set back wheels that I am aware of..

Rumor had it that Ford got there camper special idea from Chevy.
Ford wasn’t the first to try a special camper package; Chevy did it back in 1968 with its C30 “Longhorn.” These had standard eight-foot beds that GM spliced in an additional six-inch vertical section for a total of 8 1/2 feet of wood planked, expansive bed length, riding on a 133-inch wheelbase frame. With the tailgate down, there was 10 1/2 feet of load length. All of this extension magic smoothed out the ride, made for a more stable platform, and added cargo capacity—everything anyone could ever want in a hauling truck in the late-1960s.
Those were the days!!