There are many locations in that area ranging from hotels to banquet & church facilities. Not knowing your budget or vision for the wedding I can only suggest that many of the golf courses in the area are available for weddings and are often discounted. There is a new course in Sugar Hill with a brand new country club for th reception.
I have shot a wedding at eh gazebo and community center in Sugar Hill town center and also a reception at the Bona Allen Mansion, all within 20 minutes of GA400.
If I can help you further, please do not hesitate to check out our website for ideas or help. www.kingsconcepts.com