A bit of surprising good fortune. As we were arriving at the Balloon Fiesta it appeared we might be too low on fuel to run the generator.  It won’t run if you are below ¼ of a tank so you can’t run yourself out at a campground.  So, we stopped at a station a few miles short of our exit.  It had the convenience of a slave pump, woho.  We have tanks on both sides and a slave pump allows you to fill both tanks at one time.  As we pulled in diesel was priced at $2.099/gallon about 9 cents better than we had seen anywhere else.  We pumped our 85 gallons and as we were leaving we noticed the price had gone up to $2.149.  Cool!