My father told me about a similar group in the north west hills of New Jersey called “Jackson Whites”. These are supposed to be a blend of run away slaves, Hessian deserters from the British army in the 1770s, and white settlers.
The Jackson Whites ("Jacks and Whites") are NJ-area Lenape tribes which have administratively banded together, and they deny interest in building a casino. Like most people in the US who claim "Native American" heritage, they have a liberal and apparently quite varied mixture of European, African, and tribal origin.