We really like Pilot / Flying J. They are easy to find, use the app on our phone, have good prices, discount with Good Sam Club card, have large bays for fuel, long windshield cleaners too!
We have dumped there a couple of times on the way home. Discount with the Good Sam Club again, but we found one that the dump trap was not locked! Oop's! I'll keep it secret.....heehee.
And they usually have a restaurant there. Good selection of parts and tools. And, you can always take a long hot shower if you don't want to add to your grey tank.