In town,finding a gas station/convenience store with ample maneuvering room can be a challenge. There's a Racetrac about a mile from my home and right off I-4 used by RV'ers all the time, but they have a devil of a time getting in and out, partly due to the access and exit, partly because of traffic volume.
Along the Interstates, plenty of convenience stores with spacious pump islands and very tall awnings, limiting concerns about vertical clearance. And in most cases the fuel cost is less than Flying J, Love's, Pilot, TA, etc.