> (To be fair, my most preferred navigation method on long trips is to tape a piece of paper with handwritten notes to the fuel tank anyway.)

Nice to know I'm not alone. This is how I drive cars long distance (but without taping it to a fuel tank), smartphones are handy for quick short navigation, but I feel uncomfortable trusting it for longer journeys - I want to know where i'm going and how i'm going there.

The funny thing is that the act of writing down a summary of the journey, even with diagrams is usually enough for me to remember the whole thing.