In the NP itself, the only (legal) camping is in designated backcountry sites. Pretty sure most, if not all of them, have bear proof storage units now.
I wouldn't pack a gallon of water. A good chunk of the Great Smokies are technically classified as a temperate rainforest. Unless it's a really, REALLY dry spell, there's a water source in every little valley.
Last edited by linvillegorge; 11-12-2012 at 08:44 PM.