We are 48' overall and use regular gas stations most of the time. Usually the outside pumps - just have to look at layout for in/out plan. The few times were have used Flying J we have not seen any specific RV pumps either and since we are gas would not ever go into the truck diesel area. There is so much traffic and things moving around , starting stopping and it seems that because they are usually right off the x-way the left turns to get out and back on are hard because the semi's keep pouring in and out onto the roadway too either blocking your vision, or already in the lane you need to get into. So much easier, cleaner and less stress at the regular stations.