@steve-lynch
No, personally I only use the Garmin Drive App in an emergency when there is no PC available to use.
I save all routes via the connector, and for multi-day trips, I save them as (gpx 1.1 (Route, Track, POI) on my PC and put it on my SD card on the XT.
Note, you can save up to 10 routes at once on your PC, these will be saved as a .zip file. Just unzip and put it on your XT in the correct folder on your XT or SD card on your XT.
Only the route and Track that I am going to drive are visible in "My Trips" and Tracks