Ron, Ragged But Right is a duo with my wife Kathy and we sing a lot of old time songs - Delmore, Dave Macon , Charlie Poole and throw in other stuff too including banjo instrumentals. We don't have a recording yet.
Chris Coole was around as well playing banjo/fiddle with Erynn Marshall. They have a CD coming out in a few months.
Don't know about NERFA yet but thanks for the tip.