That's good to know rr2254545. Every tutorial I've seen used Base Camp. I'm going to give that a try and see how that works out. Thanks for the tip!
Edit: I was able to save an Excel spreadsheet from RV Trip wizard and then get that uploaded to the Garmin 760LMT but not a GPX file. Then within the Garmin itself it shows a "Custom POI". Whether or not that works I won't know for a couple more weeks when I go on a short trip across NY State. If it does, then I will use the Garmin on long trips and have Google Maps as a backup....Just in case.