hello cktisker.
i also live in alpharetta. well as far as i know the best place for you night be lil 5 points. there are alot of headshops and many many dealers. but it all depends. are you like mold and livin on your own or are you living with parents and goin to a school.
btw even if your outta school you could just chillin in a parkin lot around the time they get out. spot some shady kids and ask around. if not then try L5p seriously its the best place around. good luck!!