I have a 1150 AF and the heater is under the forward bench seat so that might be an issue, the aft side is a drawer and outside storage and mine has a battery under that side.
When I go mountain biking or fishing I get back to the camper to find the wife sitting in the middle on a lawn chair, says the dinette hurts the back after a while so I can see where you're going with this.
Good luck on the idea.
Bill