We have a 31' Class A with a car hauler tied on, so total length of about 55'. I've used several places in a pinch, just have to be careful how you approach the pumps. Favorite is Flying J without question. They usually have dedicated RV lanes with linked pumps on both sides and the layout allows a lot of flexibility. The pumps there are high speed, too, do filling up is fast. Most also offer LP gas in the same lanes - bonus! Great prices and good folks, too!