Please contact me directly or through my website and I can will assist you.
If you do not have the Compiled Military Service Records for these men yet you can obtain them through this message board. The link is at the top center of the page in red.
The 39th Georgia did not fight at the battle of Chickamauga but had left its parole camp in Dalton, Georgia and was at Stone Mountain, Georgia at the time being reorganzied and equipped. There were men that did not report back to Parole Camp that were still in the area at the time since two companies were from Walker, one from Dade, and one from Catoosa Counties. A handful of these men did fight as individuals at the Battle of Chickamauga.
I assume these two events you describe are separate. It did not snow in the days after the Battle fo Chickamauga (18-20 September 1863). There was the first frost of the season but no snow.
Please let me know if you have any questions. I will check my records again this evening for additional information.
Gerald D. Hodge, Jr.
War Between the States Historian
39th Georgia Volunteer Infantry Regiment