I know this will offend someone, but Alanta kinda sucks for beer. There are certainly some good spots, but they are not centralized and most don't have a Hotlanta address - think Sandy Springs, Decatur, etc. As far as Asheville, there is no place large enough for the conference hotel that I am aware of and flying into Asheville, while possible, is not a great move financially. The best prices for flights would be Charlotte, or maybe Greensboro or Greenville and then you're looking at a drive. Now the beer scene would be perfect for the conference. Darn near everything within walking distance of everything else (if there was a hotel).
Another rub is what Drew mentioned, local support. MALT has a strong club, but probably not enough to pull off the conference by itself if held in Asheville. Just the cellarmaster job and their staff would be a nightmare with 760 beers in the second round, so 2280 bottles (95 cases of beer). Couple that with club night with around 400 5gallon kegs and ProBrewer's Night with 50 (or more) 15 gallon kegs and one starts to understand the task at hand! How do you keep that many beers cold and organized can be a logistical nightmare. Most cellarmasters don't see much of the conference.
My hat's off to those who are up to the challenge!