Most of the popular hotels are already booked. In October it's almost impossible to find a discount at the Epcot resorts as F&W is happening. POFQ is pretty much a no go as it's smaller and popular and is usually sold out of discount rooms early. AoA Little Mermaid is very very popular right now being new and it's coming up as not available, some of the suites were popping up but even those were only one section.
I've been stalking different hotels for fall rates, but my first choices are very popular. I did go ahead and settle for ASMu (I needed to add two days to the end of my vacation) sometimes to get rates you just have to take what they have.
But it helps to check often because people often book multiple or back up reservations, then cancel once thier plans are final, it's the nice thing with RO discounts that you can change up without penalty up to 5 days before.