Has anyone built a carrier for either a pair of 5 gal. gas cans or a spare tire that would fit into there reciever hitch. I realize this wouldn't be the most practicle way to carry these items and maybe a bit of a headache to get into the rear of my rig (fold down option?) But we are planning a multi day trip in about a month. I don't have the money for a new rear bumper with swing out accessories and I really don't care to carry fuel inside my cab.