Don't know how fast or how many miles you plan to cover in a day.
Many people will start in Smyrna and go to Anniston. Stay in Anniston over-night and pedal back to Smyrna (Kroger parking lot).
The hotels in Cedartown don't get good reviews.
Here is my ride on both Silver Comet and Chief Ladiga in less than 12 hours:
http://ridewithgps.com/trips/1432554
You might want to spend some time at this website:
http://pathfoundation.org/trails/silver-comet/