The first one I went to was in 1973 in Wichita at Henry Levitt Arena.
I was talking to one of my friends today and the first one we went to was in Manhattan. It moved to Wichita and then later to Hays. We think we went in 1973 but it could have been 74. He is going over to his moms where the bracket he won is still up on his wall. Funny stuff.