That’s real nice for a starting four!
Those were the headliners.
Creedence warm-up was Booker T & the MGs and Wilburt Harrison.
Deep Purple Warm-up was Ike & Tina Turner Review.
I don’t remember who was warm-up for ELP or Clapton.............
Also in that same timeframe, Alice Cooper and Jethro Tull.
Later, after the Marines, I saw Asia, YES, Black Sabbath, Ted Nugent, AC/DC, Bob Segar, REO Speedwagon, Lynyrd Skynyrd, ZZ Top, Marshall Tucker, Steve Miller, Jimmy Buffett, Foreigner, Pablo Cruise, Kansas, and many more I can’t remember................🙄
... and Blue Oyster Cult and Nazareth...................
... and Van Halen............................