I am just about to convert a 90 i built for my daughter into a camper , but its a non starter without extending into front seating area AFAIC , sideways etc in a landy is OK for a few hours kip on a long drive but after that it really grates FME . I have converted a few over the years, so have a reasonable idea of what works when used for extended periods . I will be using a concertina set up that hinges at bulkhead level on passenger side . Set up involves folding passenger seat to dash, extend bunk short section thru 180deg to front , pull bunk main section down from side wall stowage position (hinged at top end between panels) to layflat on top of bulhead partition , and finish by extending front section on panel nearest sidewall thru 180deg over front passenger seat. The rear r/h corner is supported by using a seatbelt strap to clip into socket bolted to inside top of rear door . Flat panels made from ply with lots of 2 inch holes drilled to lighten and prevent condensation under sleeping materials (eg mattress / bag etc Hope that makes sense as I dont have pic of similar setup i used in 109 panelvan back in 70.s When folded you can sit with back to that side to operate cooker etc mounted on drivers side with top at bulkhead level .