I have to confess that I'm not much of a board game guy, but the classics always strike me as the best--Scrabble, Monopoly, Life, etc. Also, for a card game that's accessible and fun for those who aren't into cards, I'd suggest UNO. And I'd definitely add a checkerboard.
Movies? There are so many great movies, but I'd urge looking at those that touch on the theme of getting away . . . sometimes with disastrous results: "What About Bob?," "Cheaper by the Dozen 2," or the outrageously funny "Escanaba in da Moonlight"? For something a little more meaningful, "A River Runs Through It." Personally, I'd stay away from slasher movies; you do want your guests to sleep through the night!
As far as books are concerned, there's a huge universe out there. I'd urge a few wildlife guides, like "The Birds of [Insert Area]" and books that can be digested in the course of a day or two.
We're still in the thinking/planning phase of our cabin project, but one thing that's come to mind is the notion that there will not be a mega-TV in our cabin. It just seems out of sync with the whole notion of getting away from everything. Good luck with this . . . it sounds like pure, unadulterated fun to plan for something like this.
Don't forget outdoor games/activities. I have begun to collect games when on sale. I found a "hot potato" game that splashes the person when the time is up