Google "Diesel fuel caddy." A lot cheaper than what you are suggesting and 25-30 gallons are fairly easy to find. Find a place you can park for a few minutes to refuel. Beats worrying about finding a gas station you can fit into and gives you a chance to stretch.
Happy Camping! ///// Richard D.
2006 4x4 Ford 250 SD / 2007 Flagstaff 827 FLS
One very patient wife and one furry child who travels with us. Forty-two years of trailering and camping, and I still have a blast.