Yes, I was remembering the songbook correctly - Folksongs of Central West Virginia by Michael E. Bush. Four volumes of soft cover, spiral bound little books published in 1969. If Walking Eagle is still with us (or other interested people), PM me with your email and I'll send you scans of the tables of contents, if you are still interested. They seem to be versions of widely known songs that are not perculiar to WVa.

Also, the University of West Virginia has some recordings out, available from CAMSCO.