Pilot/Flying J has an app. One can pull up the information on stations (from a map) that includes if there are RV pumps, RV parking, a dump station, and propane.
Love's and T/A also have apps but they tend not to have RV pumps.
We typically use google maps to get an eagle-eye view of stations along our route. We put in our route then use the "search along route" to find truck stops. Once we find them we look at them in satellite view to see how tight they are.
When we pre-plan we rarely have an issue (with 2.75 years of fulltiming).