Here is a link to help you find non-ethanol gas. Make it one of your favorites.
https://www.pure-gas.org
Before I travel I always print out a list from the states I will be traveling through.
And if you stop at one of the stations and they no longer have non-ethanol, you can contact the site and have them make a change. Or, if you find a station that has non-ethanol and it is not on the list, you can notify them to add it.