Turns out, not a whole lot.
“This was not a typical backpacking or camping trip—there is no real time spent in camp, per say. You’re not sitting around and roasting marshmallows and singing songs. You eat for functional purposes—not for the experience of eating. At the end of the day, all you want to do is set up camp and get to sleep so you wake up and do it all over again. So bringing books, Kindles, or other luxury/recreational items that have nothing to do with survival or with walking very clearly becomes superfluous.”