For sure gotta put a deck on it. Instructions recommend 3/4" plywood. Might use 7/8". Or 3/4" with 1/2" sacrificial sheet over that so if/when it wears out I can just replace the top sheet. I'll seal it on both sides before installing. And thinking of 24" tall sides with provisions to add rails on top of that if needed. And tiedowns galore.

Sorting out the hardware so I don't put the four longer bolts where they don't go, I realize there are NO flat washers. It comes with nylocks though. Think I should buy a box of washers?