Hey Bill! I don't have pictures on the tablet I am on for the next few days but slowly pulled the 2nd row seats, laid down 1/2 inch of styrofoam shiny side down. 3/4" ply on top. I planned on a 28"x72" by 14" tall bed so my portapotty would just slide under and I can sit upright with a little headroom. ended up being 30" wide, next time I will try to make it a little narrower. Built it out of oak, light and strong and in 2 separate pieces. My back is a mess from a worksite fall so everything I plan for is light enough I can do it alone lol. I was going to buy a new mattress and decided to sacrifice my nearly 7 year old 10" latex memory foam mattress. The cushions squash down nicely and man I sleep like a baby on it lol. Oh, 2 turnbuckles (I think I will add a 3rd) hold the bed in place, so easy to remove if I need the van to transport something or whatnot.
I installed a MaxFan deluxe roof fan, had one in my old camper and I loved that the vent can be open year round and doesn't leak inside., a leisure battery and fuse panel, I haven't installed the little smart doohickey that will send a charge to the back leisure battery to keep it powered. I need to put the car on ramps and dread dragging them out from the shed lol.
I have some ideas for a galley, and a 6 gallon water jug and the nearly unused fresh water pump from my old sailboat that got totalled by sandy. I installed it the summer before the hurricane lol so I held onto it...so now I will eventually have some running water ... and that means eventually a luke warm shower lol.