You will be hard pressed to get 30-35% off a moderate. The best you can do is wait for a spring room only offer.
Book it in the following way....
Sign up for Ebates, link from Ebates through to Orbitz, book the room on Orbitz using one of their discount codes.
I've booked this way several times now. I just booked in Nov. for March and saved approx. $450.