I don't think parking in Manhattan would be a problem. The KSU Bramlage parking lots have at least as many parking spaces as the Kansas Colliseum. The only problem is that I don't know if Bramlage was really built for wrestling from a spectator's standpoint.
I'm sure Hays is nice, but there are very few 5A/6A teams that far West. It's a mighty long trek from Manhattan as it is. I can't imagine how long it would take for some of the KC guys.