If you have Android play (rather than Android auto), there are several apps you can use. Go to the Google Play store and do a search. The good ones will cost.
I really like RV Trip Wizard. It's part of RV Life. Look at the top of this page to see a link. It does cost about $60.00 per year.
My biggest problem with the GPS - I can't figure out how to connect it to Android auto and like you I don't want another device hanging from the dash. I use it to plan our trips - but then switch over to Google maps for turn by turn directions - making sure those directions match what the trip wizard recommends. If not, I'll add a few mid drive stops so we end up on the same route.
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