I made a rear tie down mount (additional) that consists of a 5 foot long, 2 inch square tube welded to a short draw bar that I had laying around. The draw bar plugs into the receiver and is stabilized by the turnbuckle assembles on the ends. The bar has two flat brackets, one with a vertical back that holds a standard 2 gallon plastic gas can and another flat bracket that supports a marine 3 gallon fuel tank. I put one gallon in the EU2000 which I transport inside the rear cab area which gives me a total of 6 gallons at my disposal.
This easily removable mount has been used successfully on 3 different truck campers.
Neil & Yoly
2016 Ram 2500HD Tradesman, 2WD Crew Cab, 6.4L Hemi
2018 Travel Lite 840 SBRX