Catholics believe in a religious hierarchy, Cardinals, bishops, Pope e.t.c.
Christians USUALLY think hierarchy in religion is almost blasphemous. But really it's just so they can kinda just do whatever the fuck they want and not worry about the Pope excommunicating them.
Either 1, a bunch of textbooks and encyclopedias. Or 2, a tablet/computer with said texts downloaded, a battery pack for said tablet/computer, and a few fold out solar panels or maybe one of those hand crank things. If I still have space I'd bring a soldering iron, a bunch of tips for it, flux and a bunch of different solders. Maybe a few spare parts for the laptop.
Don't fuckin lie, those are not dry dreams.