I built a camper van from a Promaster and it’s 78 inches across in the back. So with a thin layer of insulation I can fit a full size mattress across the back.

I built a camper van from a Promaster and it’s 78 inches across in the back. So with a thin layer of insulation I can fit a full size mattress across the back. The Promaster is wider than the Transit or the Sprinter.