Here's a shelf made by hubbie for a
Casita belly band, made with a kitchen shelf from Ikea. You can get hooks that go over the front rod there too, for hanging coffee mugs or whatever.
No tools required to attach or detach it.
I find it makes a big difference to reduce clutter on the kitchen prep table under the canopy. Don't trust it to be bearproof though.
Sorry the pix are upside down - they are right side up in my photo gallery. I hope they are good enough so you can make your own.