legend valley (buckeye lake ohio area) in 1979...eddie money, cheap trick, the cars and headliner todd rundgren with utopia. what a day!
they sold a certain number of tickets, i'm thinking about 25,000; but over 60,000 people got in with bootlegged tix. at some point in the day, concert-goers burned the wooden gates at the entrance, which held (i believe) all the tickets used for admission! it was a typical madhouse, with planned attendance and facilities for a certain amount and at least double that number on-site.
definitely not toronto, but big in it's day!