When I started out full timing I sought out Flying J's for all my fuel stops. I think when one is 'new at RV'ing' they feel it is easier for an RV to get fuel, propane, dump etc at a Flying J's.
Fast forward several years of REAL REAL bad service at the counter, propane island at the gas pump lane with people coming in from both directions to get propane, insane congestion at the pumps, car parking in front of store that prohibits a MH towing from ever getting out of the gas lanes until the cars move out,
I now avoid Flying J's like the plague. When I pull off the road for fuel and rest, I certainly don't need to go thru all that hassle plus abuse from a snotty uneducated lazy cashier.
Which BTW I did call Flying J and reported these cashiers and they were 'well aware of the problems with their employees across several states, so I was not the lone ranger experiencing it.
IMHO Love's are cleaner, nicer employees, AND always plenty of room at the pumps for entry and exit. And actually most right off the ramp gas stations are a better bet than any Fly J. The longer you RV the more you learn you don't need no stinkin J to fuel up at! :B