Hi Keith,
We have no listing for a Camp Defiance in or near Clarksville - the only possibility being near Ft. Defiance where the Red and Cumberland Rivers come together.
The camps we have identified are: Camp Boone, Burnett, Quarles,Forbes/Duncan/Humphries (same place, three different names depending on when and who was there), Breckinridge and a camp over in New Providence.
Greg Biggs