I weigh 260lbs, and I hopped up and down on the carrier, and it took the weight fine. I welded the brackets to the bumper, and tied the pivot area in right where the bumper meets the frame rail. Its super sturdy. I will take a couple better pictures when there is more light.
I am going to shape a 4x4x? block of wood so that i can set it on top of the cooking grate, and when the lid is shut, it clamps the block between the lid and the grate. The lid is held down with a bungee, the lid holds the block of wood, the wood holds the grate, grate holds the platesetter, platesetter holds the ring, ring holds the charcoal bowl snugly down to the bottom of the egg. As long as the pieces dont have the ability to clap together over bumps, they should all be fine. Hopefully!
The spare tire is getting relocated below the LP tank in the front of the camper.