Before our trip I use findfuelstops.com
Put in starting point City, ST...then I put in a City on our route about 300 miles from there. (we start looking for fuel at 150 miles around a half tank).
findfuelstops will post each gas station on your route, how many miles to it, and you can pull up the "satellite" view of the gas station to see how to get in and out of there.
A lot of times...we find that a lot of them we can't get in and out easily so this has been helpful for me to do for my DH.
I write the stations and exit numbers down in my spiral notebook and it works for us.
