Until recently I think there would have been parking north of State Gym/Beyer (pic below looking north in '68), but they still would have needed more. Tailgating would not have been as "professional", but would have engulfed the campus and surrounding neighborhood. Does anyone know when the track was removed? I went to hundreds of ISU events as a kid, but never really went around that part of campus. I can remember looking down Sheldon from Lincoln Way when it was pretty much all undeveloped.
It is arguable which location is better imo, but I think it is fair to say CW Field had better gates/fencing: