Okay, everybody, I can clear up one thing for certain ... the whole “band on the field” after the game.
I was behind the north end zone after the game ended. The Iowa band came down from their section in the southeast corner and exited out the northeast gate (at least to exit the playing surface, I don’t know how they got from there to the northwest gate). To get there they walked behind the visitors’ benches, in front of the wall where the seating sections begin.
I wouldn’t call that “the field” per se... I mean, it was grass, yeah, but it’s the area between the benches and the wall, so it’s used for all kinds of visiting team personnel to travel on. Did an ISU official yell at them to “get off the field”? Maybe. But I tell you from my personal observation that’s where they were, behind the visitors’ bench.
As an aside, I also saw several Iowa band members waving goodbye sarcastically and yelling things back to the students left in the student section. No, that doesn’t excuse anyone being physically assaulted or having bottles thrown at them, but they were NOT all the upstanding paragons of virtue and good sportsmanship they’re claiming to be.
(I also witnessed two unknown objects that were thrown out of the student section that Saturday - one at the Iowa coaches, I think, coming out after one of the weather breaks. The other was at the Iowa band when they came in before the game. I could not identify what was thrown - they looked like something maybe wrapped in cloth, but they had to have some heft in them to get thrown that far.)