I have found some pics from opening night (in April 1968) at the Electric Theater in Chicago, not sure if they include the padded womb rooms or the guru, but I'll take a look.
I don't know who those guys were above, but according to this one site, the headliners were the Paupers from Toronto http://rockprosopography101.blogspot.com/2010/03/kinetic-playground-chicago-il-4812-n.html i.e. these guys
The photos come from the recently recovered Chicago Sun-Times collection, Chicago History Museum, which is online (and you can order high-res prints) https://images.chicagohistory.org/