I have about the same sized rig as the OP. I plan ahead before I need gas. I have about a 400 mile range to the 1/4 tank mark. I use the gasbuddy app to get locations along my route as well as prices and sometimes photos of the station. I haven't had much luck with Pilot stations, but most FJ's on the east coast have RV lanes which work well. I believe it's all about the planning to make filling up less stressful.
Fran, Mary & Zoey (silver Cocker)
2006 Itasca Sunrise 35A, 2005 W-22, Allison 1000 5 speed
'13 Ford Focus ST or '10 Prius on Master Tow Dolly 80THD-SB or '00 Jeep Cherokee 4-down