I live in the Conyers GA and when we have the shophop I leave home early in the morning and make all the shops except for Conyers and Covington. I do them the next day. Depending on your time limit, I would not worry too much about going towards the Snellville or Buford area. Yes, these shops are nice but nothing you can't find at the other shops and they are harder to get to.
Feel free to pm me if you want more info. Google quilt shops in Atlanta and you can map out your roadtrip. Have fun!