I take a huge interest in this question because we have a whole sect of Dudleys who disappeared into the Virginia woodwork sometime around 1776 when they migrated from England along with several other sects of Dudleys. I wonder if there is a relationship, not necessarily biological (then again who knows?) between the Daniels and the Dudleys. I will be following this question and subjects I find related to it because of the time periods and the precise locations you mention which often come up in my research as if our families were migrating around the United States together like in the same caravans or something.
My ancestor, Lucy Ferguson who married Fontaine (Fountain) Tankersley had a younger sister named Susanna Ferguson who married Robert DANIEL. Robert was born about 1728 in Essex Co, VA and died about 1761 in Culpepper Co., VA. Together they had one daughter that I know of named Elizabeth DANIEL who was born November 11, 1755. Could this Daniel family be related to your Daniel family?
We just might be cuzzins after all!