I'll be there!
Apparently, there's another one happening in Hamilton on August 14th at Gage Park, but that's just what I'm reading. I don't know who's organizing that one though. In fact, there isn't a lot of information on it anywhere.
Anyway, I'll try my best to attend any and all cosplay picnics this summer! I don't think I'll bring my mermaid tail for this one, but we'll see. Definitely wearing Caimie though.