a used GPS (Garmin or TomTom) may be had on Amazon for around $60 [HERE].
Using a RAM mount, you can have the GPS (self contained...needing no cell connection) right in front of you all the time.
TomTom's smart phone app has the map ON your cell phone, so it doesn't need an active cell connection to work either.
If you get fancy, you can connect the GPS unit (and your cell phone) directly to the battery, so that both are powered as you ride and NEVER run down.
I ride with my smart phone and TomTom GO 50 mounted right in front of me with sun visors over both so I can see them more easily.
I wouldn't go back to adventuring on my NC without this setup.
I've left out a lot of detail just to make the point quickly. If you'd like detailed information and pictures .... where would you like to start?