I think it likely will be, but you can always drive in and the parking attendants will tell you for sure. Its $20 to park there. Parking along the streets in the neighborhoods west of campus would be an option too. Parking is legal on one side of the street, but both sides will be filled up. The parking ticket is $15 or something like that.
Full by 9? I doubt it. We used to park in the Hilton/Scheman lot each week for years and I don't remember it being full even when we were having sell outs of the stadium. Maybe only for an Iowa game. If someone has experienced it being full (not just closed because of rain, All-State Music, or volleyball) in the last two seasons, let us know.