Fly j and pilot are genrally pretty safe to get into, TA's well I got off the highway to try and get fuel, passed it up as its gas pumps were set up for autos and I could not get in with a towd.
We never really worry about this situation as we fuel at around 1/2 tank and tht gives you options to look at where you are stopping. Even with my truck and TT we just look at what is available and either accept or move on. I personally think too much is made of trying to find rv friendly gas stations, but that is me. Safeway and costcos generally have big stations to drive thru. Stay away from the mini-marts and small gas stations unless they have lanes on the outside perpendicular to the roadway and or a lane to turn thru to get around back or a wide driveway to turn into after fueling. A bigger concern is the entry/exit ramps to get into some of these places, mine will drag its tail if not careful!