I got two 20# propane tanks and I found them overkill for my needs. One tank is more than enough. Eventually, down on the road, I can put there a 30# which I already have. I am looking to replace one of the tanks with some sort of box or with a blue 10gal plastic drum. Using it for storage (chocks, cords, tarps etc). I can make a box from plywood to fit there, but the lightness of a plastic drum (4lbs or so) is attractive. Any other ideas?