Quote: "Nearly half my trip planning in the west involves finding gas stations that sell diesel and making extra stops to be sure we make between places that sell diesel. This more than negates any gain from getting more miles per gallon of fuel...."
My solution to that is a 91-gallon auxiliary diesel fuel tank in the bed of the F250. My range is now over 1500 miles towing...plenty of time and space to pick the cheapest and most convenient time to fill up.
One advantage to diesel is the ability to safely store and transport it compared to the more volatile gasoline.