I am on staff for Anime Blast Chattanooga. You should come and check it out. This year is our second year. If you need info www.animeblastchattanooga.com
Also MTAC is good con as well. There are two cons in pigeon forge area one was back in July called Anime South East this was their 1st year it was pretty good. The second one is called Yama Con it is december 8th-9th also a 1st year con. In Memphis there is Anime Blues Con which is in June next year that will make their 3rd year.