If you ever get the chance to watch them practice, do! I've seen them practicing over by Hancher in an open lot. The other place I have seen the band practicing is down by the Iowa Memorial Union in the open field in front of the Little Brown Church. (Can not be more descriptive then that can I?).
Parking is not so good to go watch a practice. Maybe if you want to pay to get in to see the football game, you definitely do not want to miss the half time show.
I love to watch the flag corp and hear the drum section. They are great!