I always look for Flying J's . . They normally have RV pumps off to the side of the front of the store... I used to use the big rig pumps, but after getting hung up for over 35 minutes while the driver was in the store in front of me with no way to back out I stopped.
They will fill up, and pull up... if you pull into that pump and the 5 minutes it takes you to fill up ( High output pumps) A truck pulls in after you, your boxed in...
I can;t complain, they are making money and that is their brake so I am ok with it, and avoid it when I can
***** on edit---
I also have a Titan 51 gallon diesel tank under the bed.....