According to this letter, Camp Jackson was located at Savannah.
http://www.historicalshop.com/sitecontents/confederate/documents/proposingnewcannon8051.htm

Here's a message board thread including someone else interested in Walker --
http://history-sites.com/cgi-bin/bbs53x/vacwmb/webbbs_config.pl?noframes;read=7954

Here's a marker for Decatur Teague, 8th Georgia State Troops. He's buried at Laurel Grove cemetery, Savannah GA.
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=Teague&GSiman=1&GScid=34923&GRid=66954009&

If there's not a marker under the name you mentioned, the grave could be marked "UNKNOWN" or not marked at all.