Uhhh, book in summer if you want a room. This happens every year. Short of that try Reno, there is always a good crowd, but not a sold-out crowd. Of course the weather is colder, but you will get about the same atmosphere and betting options while paying half as much, if not less, for your room. In Vegas about your only options are maybe the places down in Jean and Primm, but I hear even those tend to sell out for the Superbowl. Henderson has very few rooms for the most part, don't expect much better luck there. Just remember this particular weekend has less supply of rooms because this is the one time a year that every property goes balls out to get their best customers in house as every good gambler loves the Superbowl. That means probably more comped rooms for the weekend than at any time of the year.