I'm not a fan of sites like hotwire or priceline. For the super cheap prices, you have to roll the dice on what hotel you get. I would rather pay a few extra bucks and know what I'm getting. For giggles, I went to hotels.com and looked up the hotel for the same days. The JW rate was 50 bucks less per night.
It's definitely a YMMV thing. For the last assembly, we booked online through hotels.com and the room was 5 bucks more than the WT rate.