Mitchell, Go to the largest library in your county. Go to the local history department. If there is a helpful clerk there tell them you are interested in the Civil War history of your county. Don't tell them anything about digging, treasure hunting, artifacts or metal detecting, that could cut off their cooperation with you.
Read - read and read some more. If there are maps make copies. If there are written descriptions of events make copies. If there are books on local history check them out and take home and read. Locate older maps of the county, 1850-1920 range maps that have the roads and houses in those days, if they are in the library make copies for yourself. You need to spend about 10 hrs on research for every hour with a metal detector in hand to be consistantly sucessful.
No one is going to give up a good hunting site to you. You are going to have to ferret them out yourself. There is a lot of satisfaction of finding out about a potential site, researching it and then finding it on the ground yourself. You do that work and you won't be wanting to tell the world where it is. Good Luck!