The only thing I have to share on Scott is:
Culpeper Co Marriages:

John Scott & Tabitha Lockhard 9/1830
Martin N. Scott & Kitty Newlin 11/1/1827
Moore Scott & Rachel Evins Popham 8/3/1786
Reuben Scott & Susanna Petty 3/10/1789
Young Scott & Sally Tapp 2/25/1800 minister John Picket [Baptist]

There is a Samuel Scott in Caroline Co not sure its yours:
Militia Fines 1834-1836 a detailed listing of militia members:
Court orders badge of mourning for Samuel C. Scott, Esq. who died suddenly and copies of
their resolution to his widow and his aged parents. 8 May 1848

To take it a step further another Scott: "Thomas Scott' of Caroline Co
Thomas Scott of St. Margaret's Parish 3 Nov 1772/____1773 Wife Martha Scott. Son Rice Scott land in Prince Edward Co.
Son John Scott land in Amherst Co. Son William Scott. Son James Scott land in Prince Edward Co.
Son Samuel Scott. Daughter Frances Gatewood. Granddaughter Martha Gatewood. [A note states that James Gatewood married
Frances Scott.] Exors. Capt. Samuel Haws, John B. Roy, George Yates adn sons Rice Scott and James Scott.
Wit: John Wiley, Jenny Russel and William Davy.