As a young teen i was involved a bit with Make a Wave, and then Greenpeace when it changed names. I tried to go with them on the Phillis Cormack (up to Amchatka) but my parents wouldn't sign the skipper's insurance waiver - i was a minor. So instead i went down to the boat at dock in New Westminster and helped swab decks and paint. Watched them sail off.
So, of course i went to this concert, which was great. It felt both very 'do-it-yourself' and somehow world-changing at the same time. And Joni gave a fine few songs.

I was 22 and attending university in Victoria. I was nuts about Joni. Her music spoke to me. Some guy played Both Sides Now at a little coffeehouse in Port Alberni two years earlier, and I thought Wow! Here's a song that actually opens up this whole introspective, honest world.
Anyway I heard about the Green Peace concert in Vancouver and just had to go. I see by the poster the ticket price was quite affordable. Only $3 bucks. A friend and I hitchhiked over to Vancouver and crashed with a friend of my friend. I ate some acid at the concert and really connected with how vulnerable joni was there playing these sensitive songs in front of a huge crowd.
Interesting that the Canadian government declared the War Measures Act that same day. Phil Oches made a reference to "playing in a police state" that night.
When the Amchitka CD of this concert was released recently, I was pretty blown away. What a keepsake!