In general, stopping at stations off the freeways between the big cities seem to offer the nice tall, straight thru lanes to the pumps.
The gas stations located in the middle of town or where you can't see their tall sign off of the freeway are usually the ones to avoid, as they are set for the neighborhoods they are in and deal with cars mostly..
That's been experience anyway... ;)
I also start looking for gas around the 1/2 tank mark and never go past 1/4 tank, just in case I need to go to the next station for whatever reason..
Good luck!
Mitch