Cotton Bowl is nice, but if you lose to Alabama, the season is a disappointment. The Rose Bowl is a much higher probability of a Hawkeye victory.
God sits on the Pasadena Chamber of Commerce, and the Rose Bowl will be 70-75 degrees with a clear view of the San Gabriels from the golf course for the greatest tailgate experience you will ever have. 80%+ of the stadium will be Hawkeyes. The parade will be great experience, and there is a lot to do in Southern California from Disneyland, to Palm Springs...even Vegas is a 4 hr drive.
Unless the Hawks won it all after the Cotton Bowl, this is a no brainer