I've only booked through Disney for cash and have never had a problem getting a room. Looking at 11 months out right now there are multiple rooms available at: Bay Lake Tower, Key West, Polynesian Villas and Bungalows, Boardwalk, Animal Kingdom Kidani, Beach Club Villas, even the Villas at Grand Floridian have rooms available and I know that's one of the hardest to book.