Membership is unclear. Corry notes "The February 16, 1968 article identifies the Grateful Dead, but I think it may not have been all of them. Don't we have an account from Jef Jaisun (Phoenix bassist)? I think it was an ongoing jam session with various players cycling in and out, and I think Jerry Garcia and Jack Casady were both there." Dister says Phil was absent, and Bob Weir played bass!"
JABase (Abbott 2007): "With various members of the Jefferson Airplane, Grateful Dead, and CJF".
expost: UPI 1968 ("Hippies Support Quentin Paper"); text at deadsources