You will find truck stop gas stations, Walmart, Costco, Sams club - sufficient for your rig.
It's important to know how your vehicle turns, and exactly how much room you need.
Another tip - start looking for a good refuel place when you hit 1/2 tank. Never get below 1/4 tank in the rig. That gives you the flexibility to pull past a place if it seems too tight without having to stop.
When I'm traveling on smaller roads/ towns - I always look for a station with pumps parallel to the road - and no one at the outside pumps. I can always find one even though I have to pull inside of the outside pumps so that the fill is on the correct side of the TV.