I'd suggest Bean Blossom. It was begun by Bill Monroe in the late 60s and is now carried on in his memory by Dwight Dillman, a former Blue Grass Boy from 1974. This is one of the countries biggest and best bluegrass festivals. It's located in the heart of the US about 40 miles south of Indianapolis, Indiana or 100 miles north of Louisville, Kentucky. Dates are June 13-18.

      - Mark