Usually the fans for the second game of the session that are sitting in the allotted seats will start showing up in the second half of the first game. Last year when I went to Spokane, the evening session was Bama-Charleston followed by St. Mary's-Grand Canyon. With about 12-10 minutes to go in the Bama game, the GCU fans quite literally poured into the arena at the same time like they had all gotten off a bus together. By the time they got in, Charleston was still hanging around with Bama and the GCU fans started making noise every time Charleston would make a run and it was keeping them in it before Bama pulled away late.
Point being, if the Griz are in striking distance midway through the second half, that's likely when a lot of the BYU fans will start showing up and if the Griz can go on a run and stay in it, the BYU fans will start getting loud sensing blood in the water. The crowd can be huge in terms of helping an underdog pull the upset. All the casual fans in the arena who have no rooting interest on either side love seeing the underdogs pull it off. If the game is close, the crowd will be on the Griz side. Yes there will be a lot of Wisconsin fans there tomorrow, but plenty of Griz and casual fans will be there and if they can sense an upset brewing, they will be on the Griz side tomorrow!
Point being, if the Griz are in striking distance midway through the second half, that's likely when a lot of the BYU fans will start showing up and if the Griz can go on a run and stay in it, the BYU fans will start getting loud sensing blood in the water. The crowd can be huge in terms of helping an underdog pull the upset. All the casual fans in the arena who have no rooting interest on either side love seeing the underdogs pull it off. If the game is close, the crowd will be on the Griz side. Yes there will be a lot of Wisconsin fans there tomorrow, but plenty of Griz and casual fans will be there and if they can sense an upset brewing, they will be on the Griz side tomorrow!