Thanks for the Google Map advice. I've put in a lot of specific requests, never that one!
When we've been hop scotching across the country, we have used Pilot/Flying J's. They are located in Flying J's with separate RV lanes. If you are a Good Sam member you get a discount on the fee. Or we used to.
Big enough, DH, me and the greys!
2016 Thor ACE, 30.1.