Hmm, a friend and I did the Silver Comet, Smyrna to Cedartown and back on Nov. 1. http://ridewithgps.com/trips/1002843
It was my slowest Century to date and his first. I took my touring bike since I was essentially riding support for my friend.
I wore a long sleeve base layer, short sleeve jersey, tights over cycling shorts, hat and knit cap under the helmet, and started with long gloves. After a couple of hours I shed the long gloves but there is enough shade on the SC Trail this time of year that it stayed cool for the majority of the trip.
I plan on eating on the bike every 30 minutes on a 4+ hour ride. So I used perpeteum in my water bottle and ate a bagel every couple of hours. I was never hungry but did wish by the end that I had more electrolytes in me. Once I got some electrolytes in me, my legs felt much better (about mile 80).
Be warned that at Rockmart you will leave the rail trail and there are decent elevations changes until you get to Cedartown. Right and mile 39 is a chain breaking little bump at 8% grade. Plan ahead and watch for the crack in the asphalt on this hill. My buddy hit the crack and went down hard and that is why we slowed down so much.
There is good water at mile 22, 33, and 50 so plan your rest stops accordingly. Mile 33 is Coot's lake with the convenience store.