Ah yes, Terry, the memories of growing up in cult culture! I was a teen in the middle and late 1960's in California. Your post rang a very familiar bell. However, there were many teens I knew who, by some miracle, seemed very confident and at ease socially. I say seemed because I was one who appeared "cool" but inside was painfully insecure. I can't be the only one, can I?
Anyway, besides picnics, which I enjoyed more as a young married, there were parties. When I say parties I really mean Dances. They were a blast and truly the best thing about being a young dub. Only High School age (and singles) were invited and the chaperones were often a young married couple and a parent or two. The music ALWAYS had a great beat and we danced like we were on "American Bandstand". My "ex" attracted me by doing a great impression of James Brown, which was hilarious since he was so blond and white.
What happened to those happy daze is exactly as you described. Cult leaders supposedly received reports of drinking and looose conduct etc. and BAM! The party was O. V. E. R. I am glad I was able to at least have a little fun before the Music Died. (reference Don McClean)
More later, on how the Borg prohibition on marital oral sex affected my impressionable 20yo self and my marriage.