Think of a GPS as a tool, not the final authority. My Garmin Nuvi 1690 will never turn you in a direction that's even slightly moving away from your destination, even if it's an interstate versus a two-track. It will always get you where you want to go, but not always the best route. I use a printed map or atlas in combination with a GPS and find the GPS most useful for finding things once we reach our destination such as pharmacies, shopping areas and the like.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.