I went to the one with Sting, that was June '93. Spent the Sting set up near the stage and it was annoying because everybody thinks they can sing like him (it was like that SNL skit with him where people break out into "Roxanne" in the elevator). The highlight was that from where I was standing we could see Jerry sitting at a table off to the side of the curtain behind the stage with his long, flowing white hair and shades, smoking a cigarette (well, smoking something) and looking mystically out into the crowd like an apparition of God Himself. "Jerry's looking at me, man!" "No, man, he's looking at ME!" "No, dude. He's looking at ALLLL of us." "Whoaaaa."
Crosby, Stills & Nash opened the one in July '90. Awesome.
I still kick myself for missing the 4th of July show in '86 with Dylan and Tom Petty, though.