This bed is in a restored Airstream. I found the image on pinterest.  This looks fancier that I had imagined for my bed.   I love the dividers under the bed … Extra support and so things don’t slide around. (The preliminary  bed drawing  has 2×4’s supporting a piece of plywood.)
Only thing needed is some way to keep things from falling into the aisle.
Tension rods? Bungee cords? Rebar on open hanger clips?