Ironic you pose the question. I'm creating a rack currently that is like you box. It will sit atop the rear of the trailer. I want it for wood, but also muddy boots, etc.
I should have re-titled it "How do carry undesirable items...."
I have a grill now that I am going to start carrying with me.
Simple steel mesh that I can place on top of a fire and cooked some steaks.
If you ask me, best steak is the one cooked on an open fire
I know that no matter what I do, this thing will reek to BBQ grease.
No way I am carrying it inside my Trailer.
That's the purpose for a rack like that....
Benny