I'm in the process of designing a camper van (06 Express). I have multiple ideas. The first requirement is that it needs to be able to turn into a not-camper when it's not the weekend.
My first design involved removing the rear side trim and putting vertical plywood up to the windows with a little shelf under the window. Behind those panels I could hide an inverter, maybe a couple batteries, and some tools/jumper cables/jack/etc. I could put some e-track on the plywood, then put some load bars and a platform across to lay a mattress.
My second idea was to install some of those drawers like this:
I would actually probably build them out of plywood. The system pictured above is A) not really long enough to be a bed at 62", and B) it's $1600. It's a lovely system, but I can buy the drawer slides for $80 and likely build it for 1/10th the cost of buying it.
Pros? Cons? The only big con I can think of is that it would remove about 12" of height from the cargo area. It's rare that I need to transport something a full 4' tall, but it is nice to know that right now I could put a riding lawn mower in there if needed.
Tell me why I should (or shouldn't) put big honkin drawers in my van.