At the beginning of October in San Francisco's Golden Gate Park, is Warren Hellman's 3 day long "Hardly Strictly Bluegrass Festival", which is held every year for free. All of our featured artists on The 3D RadioActivity's 452nd episode performed onstage this year, although I will keep you in a bit of suspense, as I do not reveal how they all tie in until the very end of the … [Read more...] about 3D HSBF 18