A camping forum for VW bus and camper owners.
An additional thought about the wood is to use multi-ply cabinet grade plywood. Prolly 3/4 thick. My Westy's seat/bench/bed thingy has cabinet grade plywood with a strongback. Do not mistake 3/4 plywood from the big box store(s) as the way to go. Find a lumber yard. The left over wood can be used for shelving or speaker cab's and whatnot.