Couldn't read all through the thread, gotta run...Hope this isn't redundent...
But Uncle Dave Macon's old house is just as he left it in Readyville, Tennessee. If you listen to his song "From Earth to Heaven" he gives the address. It is about halfway between Murphreesboro (on Interstate 24 and home of the Saturn plant) and Woodbury, Tennessee. Up on a hillside outside Woodbury there is a modest granite monument to "the Dixie Dewdrop" as he was called. Has an etched image of a five string banjo on it. Real purty.
The road from Woodbury to Murphreesboro is called the "Old Woodbury Pike" by locals. It is Highway 70. Crosses Criple Creek just West of Readyville. They have a big festival down there in July.