OK, my flight is booked for Las Vegas from where I will be for the Holidays. Using miles I can redeposit those if I need to cancel. However, there were limited seats left on the flights I wanted so it made sense to lock in now.
FWIW many airlines offer a 24 hour free cancellation from time of booking so there is little risk in booking tomorrow afternoon which should be within the 24 hour free cancellation window.
For NU fans coming from Chicago my guess is fares and/or availabily will go up and become limited once the destination is announced Sunday. Could also be true for many other points of departure as people finalize Christmas travel plans and the supply of seats diminish.
As to a hotel, here is a suggestion from my separate thread regarding The Cats projected by Sporting News to go to Las Vegas:
Just checked and see the Luxor (where the Titanic Exhibit is located) is a close .5 miles walking distance from the Allegiant Stadium and very reasonably priced. (There does not appear to be anything closer in its under $100 a night price range and the few that are closer are only by .1 of a mile. Also there appears to be a bridge that is closed to vehicles and open for pedestrians on game day to get to the stadium.
(By the way I highly recommend taking in the Titanic exhibit. Although it has the replicated iconic staircase, the highlight for me was the huge piece of the Titanic that fills a large room. It is amazing that it could be salvaged from such a depth. For details including a great photo of the piece check out the National Geographic's special Titanic issue currently on newsstands. In addition many of the pictured artifacts in the magazine are also there on display at the Luxor.)