I was there once.
Full disclosure: not my kind of venue for golf.
GREAT destination with kids as the beach club on the lake is wonderful.
However, I found the golf courses to be "resort generic" through and through and saw them all to be indistinguishable from each other.
That is to say they are all nice, well-conditioned, moderately interesting resort courses that are over-priced and require carts. But, if you're stuck at a conference, at least there are decent courses to choose from...;-)
It's an all-star team of 80's architects: Fazio, Nicklaus, Rees Jones, Cupp.....7 courses total.
Perhaps go to golfdigest.com and pick the top one. I heard that the courses are being slowly all redone. Good.
January in north Georgia?
Could be 35 degrees, could be 55 degrees F.