I may have some info (and hoping you might have some for me).
John Bear, who served with the 4th Regiment, Tennessee Cavalry (USA), Company K, in the Civil War, and was buried in the Old Kingsport Presbyterian Church Cemetery, in Kingsport, TN, in 1918, is my great-great-grandfather. One of his sons, Charlie, was my great-grandfather, and Charlie's daughter, Bertha Mae, was my grandmother (she passed away 1982 in Kingsport). It appears I have several ancestors in that cemetery.
I'd love to swap info... maybe we can help each other fill any gaps.