A hitch mounted cargo tray/basket thing with a permanently attached weather resistant rubbermaid container has been one of my most helpful items for the camper. I can toss all the dirty or wet items like dutch ovens, water fill up hose, fire grill, dog food dishes, charcoal, etc. in the container and not have to worry about it sliding around making a mess in the camper. I mounted it with plywood cut to match the bottom of the container and bolts run through the wood, plastic, and expanded steel of the cargo basket. I left a couple holes empty to act as drains if need be. It has been super solid and we still have room on the other side of the tray for other bulky items to strap down (coolers, firewood, game meat, you name it). It also makes a nice "porch" too for getting in and out of the camper.
