Harrah's owns the Imperial Palace, as well as Caesar's Palace, Bally's, Flamingo Hilton, the Paris, Barbary Coast, etc... (you get the idea).
Having said that, the IP may be your best bet to watch the Sioux/Gophers game. The IP sports book is usually pretty quiet at night, I'd ask someone in the horse racing area and they might put the game up on a screen.