nycdave, do you have any notes on the show at the Gorge in George? I really enjoyed Joan osborn's contribution to that line-up....
On July 3, 2004 the Dead played The Gorge, in George, Wa. Joan did not play with the Dead in 2004. Warren was in that band, and Derek Trucks joined the band after D/S in the second Set. From what I know (which may not be all that much) Joan played with the Dead in 2003 and Phil and Friends in 2006. There is no mention of any shows with Joan at either the Gorge, or in Washington during her tenor with the Dead or P & F.
Joan did play at the Gorge on May 1, 1997 as part of the Lilith Fair. Sorry I couldn't be more helpful.