what I've found is that rural stations in general are easier for me to get in and out of than many stations along the interstate. Seems like at least in the west/midwest small towns also have lots of farmers/ranchers coming in with bigger trucks and/or trailers anyway and the islands are pretty easy to get in and out of.
And I've found diesel also easy to come by in rural areas, again probably because so many farmers/ranchers need diesel. just need to watch which pump. Last week in two different towns the diesel island had red diesel(off road), on road #2 diesel, and #1 diesel.
We just watch for how far to the next station. In many places it can be 100-150 miles between stations. We carry and extra 10 gallons of diesel, but haven't had to use it yet.
Biggest downside to small towns is pumps aren't always open 24/7. expect them to closed in the evening and occasionally not be open on sunday.