I"ve round VERY FEW gas stations that I can't use with my 34 foot trailer. EVEN t hose convenience store stations are not off limits if you choose an end pump position. I really can't even imagine planning where I would need gas on a trip so when I get low, I pull in somewhere. My only preference is to avoid truck stops as much as possible because of the high traffic in the area and they are usually a little higher priced than other stations in the area.
For me it's a LOT of planning if I decide ahead of time which highway I'll be using :)
Good luck / Skip