'bout the same
I am prohibited by a final authority from putting any "outside stuff" inside the Airstream while travelling. Fortunately, the compartments with outside doors are not considered "inside". There are a few of those on the FB model so the hitch pieces, hoses, power cords, cleaning/maintenance stuff, and tools go in there.
The rest goes in the bed of the pickup in bags. The reclining lawn chairs and folding table in some large breathable chair bags from the local RV store with carry handles. The outdoor rug in a carry case I got from Camping World. The propane grill has a cover I ordered from the manufacturer.
Except for the firepit you mention, those bags might help keep things clean in the back of the Suburban.
2006 Safari SE FB
2000 F150 4.2L
2011 F250 6.2L