We chose to go with the Nantahala Outdoor Center guiding the trip (www.noc.com). They have a post in a small area in north Georgia (only about 45 minutes from the N.C. border). The guide was really friendly, and it was his "part of the year" job to guide rafting trips.
We did section III of the river, which provided a couple of "big" dips for us, but I would have preferred a little more action with some class IVs. It was about $60 per person, and they provided all the equipment, wetsuits, and a nice picnic-style lunch that we had on a sandbar after about 30 minutes of rafting. I was there in mid-October, and it was definitely a little chilly when the sun started going down, but otherwise it was good and lots of fun.