Five members of the family, all descendants of Gardner and Harriet Hardy are among the people I have access to the DNA results. I have also contacted and messaged other relatives who have tested. What we know is that every member has DNA linking them to the Bobo family. Additional data shows that everyone also has DNA matches to the descendants of Ephraim King.
My father has some of the larger matches to the Bobo family. All of his matches are direct descendants of Spencer Bobo and his wife Beulah Yarborough. The other four folks have matches to descendants of several Bobo's, with Spencer prevalent among them. What this means to me is that any connection we have is from the Bobo family directly.
Because all of the descendants are from Gardner and Harriet (through Shep Sr, Ephraim and Robert Hardy), the connection has to come from either Gardner Hardy's mother or Harriet. I suspect that the connection is through the mother of Gardner. Like the Hardy or Hardee family, the Bobo's are in nearby South Carolina around this time. Descendants of Thomas Edward Hardee are also showing matches to the Bobo's, but I can't prove this isn't just a coincidence. I can't yet figure out where this connection is, but it is certainly a starting point.
As for Ephraim King, we know he was born in North Carolina, moved to Georgia and died in Coffee County, Alabama in 1855. In 1850 he does have a child Harriet in his home, but the 1840 census does not include a child her age, and I think she is not a child but a grandchild, contrary to the researchers of this family. We know that Ephraim and his family lived about 5 miles from Gardner Hardy based on the land records for everyone. We know that in 1850 Gardner Hardy and Harriet are living with a John S. King in Santa Rosa county, Florida. We know that Gardner Hardy and Harriet name their youngest son Ephraim.
I think that Harriet is definitely a relative of Ephraim King, and I wish I could find them in 1830 to prove my theory that she is his daughter.