If you're somewhat adventurous you might go in a slightly different direction and hunt down the many recordings of Bradley Kincaid, Hylo Brown or Lee Moore. These artists (all deceased?) would be seen by some as "country", but they did indeed record many traditional folksongs.

If you're not familiar with Joe Hickerson's recordings on Folk-Legacy, check them out. They're among my all-time favourites. One night on Sharon mountain (inside their house I'd better add) Caroline Paton (strongly) suggested I hear Joe, and for the next few days I wallowed in him!