Here's my 85% solution; the sleeping platform is done with fridge installation where the center seat was. Driver's side second row seat is folded down and I have a storage door installed in that area. Passenger side is getting the fresh water tank, gray water tank for hot water heater/showers and 2nd battery with solar on the Power Distribution Panel (PDP). PDP will have the accessory fuse box, solar controller/charger, etc.. for all of those goodies.
The under platform in the back is currently getting a single slider that will house my removable organizer boxes (FR Wolf/Cub Packs) and quick access bags behind the tailgate for the various configurations of trips; the bags are the tan squares and will be velcro'd on the back panel for quick installation/removal.
Work in progress but getting there. Please disregard the dimensions of my chicken-scratch drawings. lol