I have been using Flying J for 15 years as dedicated as I can be . On my last trip 5000 miles I had to use whatever diesel stations available .they were cheaper ,faster ,They would just turn the pump ...
Gas buddy is goodr than grits and gravy block here or there can save you .10 a gallon! If in doubt you can Google ingress egress. 38 ft MH towing a 20 ft car hauler that's important