There was not a lot of Civil War activity in Hickman County, although there is some. I'll tell you what comes to mind off hand. Major Dick McCann, the leader of a Confederate Cavalry battalion was captured with many of his men near the old Pinewood Mansion. Jerome Spence talks about this and refers to the location as Weem's Springs. Most people think this is a reference to the famous Bon Aqua Springs, but that is incorrect. There was a Confederate guerilla camp near Centerville it is called "Little Texas." Yankee troops occupied the town of Centerville and burned the court house. There were several skirmishes in Kinderhook. Look this up in the Official Records for more information.
The Co. H the "Hickman Guards" of the 11th Tennessee Infantry spent the night of May 10, 1861 at Bon Aqua Springs and the regiment held a post war reunion there in the 1880's. A major of the 11th Tennessee P.V.H. Weems owened Bon Aqua Springs before the war. His home is still standing and was owned by Johnny Cash, unitl his death (I do not know if the family still owns the house or not). Weems was killed in the Battle of Atlanta and in the 1880's was exhumed from the CS cemetery in Griffin, GA and brought back in a vinegar barrel by wagon and buried in the family cemetery located at the end of Weem's Cemetery road near Bon Aqua Springs. You can see the back of the Weems' house from the cemetery.
Regarding McNairy, I do not recall off hand what all he did in Hickman County, but I do know that he led raids against the Nashville and Northwestern Railroad around Burns, Tennessee which is in Dickson County, the county just above Hickman.
For further information about some of the troops from Hickman County check out our website on the 11th Tennessee Infantry at www.11thtennessee.org