I'm going the last week of September, and even though it's traditionally a slow period of the year, room availability during that time is not as plentiful as usual. I booked a room a couple of months ago at DLH, and at that time, I either had to get a standard room, or concierge, although I wanted a pool/resort view. Only a couple of weeks ago pool/resort view rooms opened up. And yesterday, I did a search on the official site, and there were NO rooms at PP, and at GC, the only rooms available were Artisan Suites.
You can keep looking in hopes of a cancellation (my guess is that there won't be any rooms available on Expedia or Travelocity -- I'm sure Disney knows that they can get the full rack rate on all of their rooms on dates near the actual anniversary), but I think it would be wise to book an offsite room since even those are a hot commodity right now.
Good luck!