Good stuff, Don. I'm in North GA m'self, and looking for bikepack-able terrain. Nowhere near enough fitness level to tackle the entire TNGA, but maybe in small sections to start...
Where about in N. GA are you? I live in the N. Ga area as well. I love the area around the tanasi trail system. you can link up those gravel roads and trails all the way to Dalton and beyond. Hit me up if you need some ideas.
B