I am curious to see what my Garmin does on the day. fortunately I use it more for logging than navigation.
I've had my own moment of GPS cockup when I asked Google Maps for the way to the new nature reserve and got directed to dead end private road on the opposite side of the park from the entrance gate. Fortunately Google learned but I still sanity check when possible. I also have a lot of maps and a Silva compass, JIC.