Just for kicks - and since I didn't have anything better to do - I goggled "South Holston River camping" and here's some of what I came up with:
B&B Lakeside Campground, Bluff City, TN, 423.383.5555
Bristol-Kingsport KIA, 425 Rocky Branch Rd., Blount ville, TN 37617, 800.562.7640
Holston View Campground, 207 Old Weaver Pike, Bluff City, TN 37618, 423.367.6627
I was actually trying to find out if there was any camping at Watauga Lake - a beautiful piece of God's country!!