Robin,depending on how much time you have, you may still be able to contact the memorial U folks by email...
The boys did go to Memorial. Darryl took several folklore classes, and Sean took one or two. A friend of mine is a prof who remembers Darryl fondly.
Dirty Linen did a feature on GBS recently; it's on line at their web site www.dirtylinen.com. Go through the back issues and you'll find it in the one with Tom Paxton on the cover.