welcome to the forum!
Are there any national forests with open rifle ranges in the area?
I've found a couple in the low country and a couple in the upsate grrenville area.
It would be great to find one in the sandhills area.
Also, I went to tec school in the charleston area back in the early 80's and took a class from a Dr. JB Coker who claimed to be of the Coker College family. He was an old fart at that time so I'm sure he's long left us, but he had a lot of great stories to tell. I never could verify the family lineage claims though.
I'll have to look it up and see if I can find it on the internet.