This site is hosted by Doris Robbins and has lots of useful information.
Bartow County GenWeb
Bartow County used to be Cass County.
Floyd County, Georgia
Another very helpful site.
Chattooga County, Georgia
This is the county in which Joseph Ely Drummond and his family lived from at least 1910 until after 1930.
Another Polk County Site
I have a link to this site because it was the first site I came across when I started my research. It has been helpful although it doesn't seem to be updated regularly.
Georgia Counties Selection List
This site links to all county pages in Georgia.