Neat (pun intended) idea, Peto!
Here's what I did with my closet...
*Two wheeled carts that I had left over from using as displays in my shop (bought at K-Mart/Target/Walmart/Menard's), bottom one slightly deeper than the top one to accommodate the curve in the outside wall. Wheels removed from both.
*Piece of clear plexiglass cut to size from what was left over when I redid the fridge
door with a BWCAW map. This keeps top unit from slipping down between the wire grid of the bottom unit.
*Short length of 1/2" PVC pipe (left over from making a kayak dolly) zip-tied to bottom of top shelf so I could have an itty bitty place to hang a rain jacket (very thin jacket plus one or two other thin things on skinny kid hangers, that is), or put tall things like hiking poles.
*Coated wire two-shelf unit mounted to inside of door.
Still able to get to bottom shelf because I put things there that go on the kitchen counter when I'm camped. Can remove the whole unit when I'm ready to do something more permanent.
Also put one of those battery-operated round 6-LED lights
using the hook side of the hook-n-loop attached to the back to stick to the rat fur. The closet sidewalls and the area under the sink are the only places with rat fur in my '84 Scamp
. Must have been a retrofit.