Happy 4th Ray!
It's good to hear from someone else who's parents were cool enough to let their (and in my case drive) kids go to concerts at the time.
I'm about the same age as your brother and my mom drove my buddy and I to see both Hendrix and Cream in '68.
The next year, that same friend's mom drove us to the first Atlanta Pop Festival. We were supposed to meet her at the gate at a certain time that night.
Of course we totally forgot about the time. And in one of those amazing mom stories, somehow she found us in a crowd of over 100,000!
I can still hear her voice as she called out her son's name (we were close to the stage lip and IIRC, Blood Sweat and Tears were playing).
When I looked over, there she was. Standing in a pumping crowd of dirty concertgoers in a nice neat dress clutching her shinny black purse.
On the 2 hour drive home, she scolded my buddy as if he'd wandered off at the store and we looked at each other in astonishment for the entire ride home.
I guess I should have told this story on St. Mother's Day.