I am a white Carter descendant. My line came through the areas you mention. In MS, I believe they were south of Meridian in the Quitman area. I do not know if any of them had slaves, although I know some of the other family who married into the Carter family had slaves that refused to leave, when given the opportunity, because they were treated well and did not want to venture into the unknown and dangerous "free" world. They wound up a little more north, in southern Arkansas, I believe. I am quoting my father, as he did the family history research, before he died in 2001. In my brief research in Quitman and Meridian, MS, I believe I found that some of our Carters did own slaves, but I can't remember more, right now. Sorry I can't offer more, but hopefully, this little bit might lead you to more info.