I went to the San Diego Comic-Con once, in 2008 or 2009. Never again. It no longer caters to the intelligent, discerning patrons you see above.
I’m intrigued by the Orange County Nostalgic Society seen in the second photo. That’s Neal Adams in the last photo.
The pictures are from Comic-Convention Memories, an amazing love letter to the early cons and the people who got them started. It’s run by Mike Towry, one of the founding members of the SDCC.