I am from South Carolina and lived in Beaufort for about a year before coming to the Pacific Northwest. I can tell you from experience that people don't usually talk about the practices but if you are in the right place at the right time, you can pick up some information by way of listening and asking the right questions.
I learned a great deal when I worked at the Winn-Dixie selling lottery tickets to the ladies that come in with their dream books. There's was also a store that sold some beautiful African Artwork, Jewelry, Music, etc...as well as a small selection of Vigil Candles that was owned by a practitioner who would give advice on how to burn them. I don't believe that I can tell you the name as this forum is for explaining Lucky Mojo products, but if you ask around you may be able to find it.
You may also want to visit Daufuskie Island, the home of the Gullah people. Books you may wish to read include
Blue Roots by Roger Pinckney
God, Dr. Buzzard, and the Bolito Man by Cornelia Walker Baily.
Hoodoo Rootwork Correspondence Course Graduate # 56G