Because most gas coaches have their fuel pump in the tank, it is not advisable to let the tank run close to empty. That said I have never had any problem fueling my gas coach and I always am towing my toad. When my tank is approaching 1/4 tank I will stop at the next station that I can get in to. I have stopped at small stations that only had two pumps but it had easy access in and out. As long as you do not wait until you have no choice bu to use the stations near you, you should not have any issues. I very seldom use the large truck stops because they are usually the most expensive. I have found that the smaller stations away from the exit have lower prices and there is always one that I can fit into. If my tanks is below 1/2 full by the gauge, and I am driving past a station with easy access, I will stop.