Been looking at the drought conditions for the U.S. and much of the appalachians are in a drought, not really bad, but it's something to watch.
If you look at the two maps you can pick a date and look at the drought history and compare to today's status http://drought.unl.edu/dm/archive.html
And if you look at this map it lists both drought types (A -- Agricultural & H -- Hydrological). Although I wonder how they get that information WRT the mountains, I'm thinking maybe no one even looks at much of it, but regardless if the area is in a drought the mountain sources will be affected. http://drought.unl.edu/dm/monitor.html
Bottom line, you may want to play it safe and always have some water on hand.