It is so good to hear people discussing Samuel Bright.
What Charles said is ALMOST TRUE. The Bright's Trace came thru the Watauga Settlement, up Gap Creek to the Doe River to a place just before present day Roan Mtn,TN, then up and over the Yellow Mtn Gap to the head of Roaring Creek then along the Toe River, by Davenport Spring and Bright's Home Place to Grassy Creek then down the Mtn to Quaker Meadows( north west of Morganton on Hwy 181 today) where they met other volunteers from Wilkes and Burke before going to King's Mtn. I believe the road through Iron Mtn to Limestone Cove was later. David Baker didn't move to 'Bakersville' until the late 1790's.
The 1200 acres are located in the present day Ingalls area from Brushy Creek to Harris and White Creeks, where UNIMIN is located. He did own land near Roaring Creek too.
He did leave the area just after the 1800 census and arrived at Wofford's Settlement just inside GA from NC/SC. I haven't been able to prove the Grant story. There is a road out of Altapass called Pepper's Creek that leads to the North Cove and William McKinney lived close by. The Parkway calls that intersection "McKinney Gap".
Samuel Bright only left his name on the almost forgotten "Bright's Trace" and "Bright's Cemetery". Lt.Robert Sevier, younger brother of 1st TN GOV. John Sevier, is buried there. He died on his way home from The Battle of King's Mountain.
I believe the Bright lady you are looking for would be born 1840-1850. David has done more research on the Bright's who stayed in the area and maybe he knows who her father could be.