Within the Hiwassee River Basin, there are only three wineries, one each in NC, GA and TN. But there are at least 9 more nearby.

http://www.cranecreekvineyards.com/ Young Harris, GA, (In the Hiwassee River Basin) 

http://bsvw.com/ Blackstock Vineyards, Dahlonega, GA

http://www.frogtownwine.com/ Dahlonega/Frogtown, GA

http://www.threesistersvineyards.com/ Dahlonega, GA

http://www.montaluce.com/ Dahlonega, GA

http://www.wolfmountainvineyards.com/Dahlonega, GA

http://www.habershamwinery.com/ Helen, GA

http://www.tigerwine.com/ Tiger, GA near Clayton, GA

http://www.persimmoncreekwine.com/ Clayton, GA

http://www.cartecayvineyards.com/ Ellijay, GA

http://www.calaboosecellars.com Andrews, NC, (In the Hiwassee River Basin) 

http://www.ocoeewinery.com Cleveland, TN, (In the Hiwassee River Basin)