I have yet to do my first dedicated bike tour but for regular rides I use my Garmin Fenix 5x wristwatch and sync it with the sister app. That's to track my performance not navigation. However, when I am backpacking I use a map and compass and have a GPS as my backup. I find that I can orient myself to the landscape better with a map than a 3" screen. Same thing goes when I'm on a road trip with my car.