Not that I'm saying this isn't a good idea, but you might also want to look into some of the other events between now and March, like:
-Tybee Cosplay Photoshoot - Oct. 20th (may be too far, tho)
-NerdaCon - Nov. 16-17th (Columbus, again, might be too far)
-Atlanta Anime Day - Nov. 24th
-Cosplayers on Ice - Dec. 1st
Several specific cosplay groups (like Georgia Bronies or AtlStuck) also are hosting a bunch of events.