I might be able to at least get you closer to your target. I am descended from three of the people whom you mentioned: James Craig, Alexander Kennedy and James Rosborough. In fact, I curate the Kennedy-Craig Cemetery, which also contains some Rosboroughs I believe. The location of that Cemetery might at least give you a clue as to where your ancestors land was. The cemetery is close to the junction of Peach Road, (just where it crosses I-77) and Mt Hope Road. This location is South-west of Ridgeway, SC There are 3 or 4 small creeks that converge very near this intersection and flow into Cedar Creek, I imagine that one of them maybe Turkey Creek, but I'm not sure which one. I know that most of my ancestors in the 1780s were born on Cedar Creek. Hope this helps!