Now that I am typing this, I am thinking perhaps that taking a tablet with a metric !@#% ton of books might do the trick. What do you fine folks think, or what are your experiences with the psychology of riding cross country solo?
Not to push the point too far and be accused of retrogrouchery but tens of thousands of folks road much further and longer than you're planning without any electronics (or disk brakes) at all. A paperback and a notebook/pencil can keep you company for a long time and you can trade the book with another adventurer along the way.
Modern contrivances are luxuries; fun and interesting and stimulating and reassuring but unnecessary in the bigger scheme of what you want and need on a crosscountry solo ride.
Enjoy your trip and take whatever you think will make it more enjoyable or safe.