Two 2×6 planks act as support, with some plywood on top as a base for my sleeping bag. The bucket is my storage for food, car maintenance stuff, and extra clothes.
Cooler and gas can are corded to the bed so they don’t go flying on dirt roads.
Total setup cost me maybe $80 for the wood and everything else I had laying around.
Very comfortable, my bed is 6ft long so i can sleep normally. Tried it out this weekend and had a blast!