The main reason that I liked to go to Minnesota games at the Metrodome was that you could buy beers. Now with their shiny new stadium on campus, no beer available.... except for the fat cat university boosters in their box suites, of course.
A flask is a necessity for attending a college game, otherwise no matter how much you've 'prepared', you will hit a wall by halftime and either start nodding off or leaving the game early for the nearest bar.