PGC camping regulations are fairly restrictive - the Game Commission's primary focus is habitat preservation and wildlife management. You may camp overnight WITHIN 200 feet of the footpath, provided that you are more than 500 feet away from parking lots, road crossings, trailheads and WATER SOURCES. "Warming fires" are permitted except when the danger of wildfires is "high, very high, or extreme" (as defined by the Bureau of Forestry). Also, you need to enter the A.T. at a different point than the one from which you exit. And be aware that the entire month of May is Spring Gobbler season, so there will be hunters in the woods every day except Sunday.