I camp quite a bit and I don't travel light, I have 4 man tent of the 4 season type (yes I do camp in the middle of the winter), gas stoves that I use to cook for 4 people, 5 or 6 solar lights that I stake into the ground for night light (I have a kerosene lamp as back up), the usual tarps, ground cloth, clothing, gas heater buddy for winter camping (keeps the tent warm), gas heater for the shower (used a solar shower this is just better), although I did buy the 1 lb sleeping bag that is good to -20F, And I take a book or two with me. Camping with electronics is a pain. Waking up with morning dew all over a camera (and in it) or phone since it was left sitting out all night, or still on you for when you fall a sleep around the camp fire is not nice. Or when it rains or if there is a lot of fog in the air again not good for the device. It's really about having one less item to worry about keeping safe. I take several books on outdoor lore that I've had for years and some reading books with me.
The reading ones I sell back to a second market book re-seller which I then put towards my next book. http://www.hpb.com/
I actually sold them my Borders e-reader when I upgraded my android tablet to a 7" Polaroid which I carry with me all over the place (yes in addition to the paper back books that I still read) but I leave at home when I go camping. Also I have a Sylvania android tablet that I plan on getting rid of soon.
Now if my trip only involves me staying in hotels then that's something else I take my e-reader to do my e-mail and such. But for when I'm out in public I still use a paper book because getting mugged is not fun. If the devices cost 10 dollars and were as cheap to replace I wouldn't have a problem of showing my wares to everyone (and locked down for id safety purposes)
And e-readers still lack things. Things like sun light (although haven't tried the kindle) and the problem with falling asleep at night because of the back light affecting me. Also the whole dirty hands trying to make the pages turn, and not to mention keeping the thing clean from dirt and sand from the beach and so on. It's just easier to take a paper book.