Peggy bought me a Farm Store tank, and a electric transfer pump and handle from Craigslist. Less than $300 for both. I do have to get out and manually put the fuel filler in the truck tank opening and turn the pump on, but not that big of a deal.
It's only a 40 gallon tank but allows me to pick and choose where I want to stop for a break. I also no longer have to make sure I can get into and out of a fuel station with that 40 foot toy hauler. :) I fill up at the end of the day when we're unhooked. I wouldn't be without one.