Hotels for PDAC get booked very fast, often a 8-12 months in advance for prime locations such as the Royal York & Intercontinental.
I suggest that if you want to book a hotel, you use Expedia or Travelocity for the dates and locations you are interested in so that you can get a good idea of what you are in for.
..... Just checked. There are some good spots still out there, but the central locations have inflated prices for the most part. Look at the Novotel, Cosmopolitan, Pantages, Ramada Plaza and Sutton Place which still over a decent value.