Remember watching mosh pits while working or checking out bands to work. Generally the front security would be “professional” security. If you ended up in the security zone, you most likely were leaving it unconscious and tossed outside.Said it earlier but that aggressive music was 'the thing' at the time as well.
Bad mix for a concert series known for the theme of 'peace and love' and skinny dipping.
If it were done today I'd bet it would be more like Glastonbury or something....plenty of great, popular live acts mixed with older classics.