|Bill Murray and Phil Lesh|
Murray seems to have spent a lot of his time with Lewis (understandably) whose phenomenal album The Voyager is steeped in personal pyschedelic references.
Other notables backstage for the concerts (according to Relix) included:
David Axelrod, Al Franken, Perry Farrell (Jane's Addiction was onced described by Garcia as his favourite current band), self-avowed Deadhead George RR Martin, Lee Ranaldo, Liz Phair, Yo La Tengo's Ira Kaplan, Colts owner Jim Irsay and members of Wilco, The National and The Avett Brothers. Also Phish' Mike Gordon and Page McConnell and members of various forgettable jambands (moe., the Disco Biscuits and Lettuce).
Oh and Chloe Sevigny and Katy Perry were there too.