I would recommend Josh Copeland at RBI Baseball. Our 12U team hit over 30 HR's this past season! He will be coaching a 13U team. His number is 7708516301. Best of luck! The facility is off of Hwy 16 towards Newnan.
Best Hitting Instructor hands down is Bert Strane who lives in Conyers, GA. His number is 510-472-7215 . He’s trained more kids that have gone on to play Pro Ball and Division 1 then majority of these hitting instructors combined.