I want to incorporate/fuse this idea with the basic principles of a steamer chest or carpenter's toolbox. Have the big drawer that slid out open outward to create an L-shape with fold up legs to support it and staircase trays open up to create shelves. Boom! full size bar.
How to Make Adventure Truck - DIY & Crafts - Handimania
"I took a 7 week coast-to-coast road trip after being laid off...I didn’t have a camper but realized that being able to pull off the road at a rest or truck stop was the way to go to make the trip affordable. With a few sheets of 1/2” plywood and misc. hardware this is what I came up with. The effort was well worth the time and materials."