^I hope you arent suggesting Mike Campbell sits it out.
Maybe there is a new breed traveling wilburys Tom Petty Eddie Vedder Steve Winwood Bob Dylan Jeff Lynn
Campbell and Petty are attached at the hip. Even on Tom's "solo" records its Mike playing guitar.
I have nothing to base this on, but if you do Petty & Friends, I think you bring Mike and Benmont and fill in the other slots with Friends to distinguish it from a Heartbreakers show.
I mentioned this in another Petty thread, but there's a Mudcrutch album recorded that will come out sometimes in 2008. One of the guitar players, Tom Leadon, lives in Nashville. When Petty talked to Rolling Stone in December, he mentioned summer festivals as a possibility for Mudcrutch shows. Why not make Mudcrutch his backing band for a night at Bonnaroo?