I take an IPAD, with me. You need the "camera kit" as well, which is just an adapter that you plug the card into, works great. I then use the IPAD to emai, surf IW, play games, read books and watch movies while in the tree stand. It also allows you to look at your photo library right there to try and determine if the buck you just got on camera is one you have seen before.
I run ten cameras, so by the time I go and buy 10 additional cards to be able to swap out I was already half way to an IPAD. Once you have one you'll never go back to using a pc at home, very versatile. Over Christmas, I downloaded kid movies on it and had the kids watching videos on it during the trip. That four hours of peace and quiet was worth it alone.