A couple of hours away is actually quite far...to the north it would put them near Blue Ridge (and the terrain is all wrong)
Filming takes place closer to Conyers I believe. Though one could suggest that Woodbury was more like Buckhead or Woodstock.
A couple of hours south puts you closer to the Gulf. To the west you are in Alabama. To the east you are closing in on Savannah.
Since Atlanta’s original name was Terminus just figure it is close to Atlanta.... certainly within walking distance. Maybe Kennesaw or Smyrna or out that way
Kennesaw would probably fare well in a zombie disaster. They had an ordinance that every home had to have a gun.