I check the AP calendar regularly, and I know June 14th has been "sold out" for at least 4 weeks. I'm pretty sure that Disney reserved a lot of the rooms for the media (Media Day is June 14th for Carsland). Just guessing, but it makes sense to me. One option you may want to consider, although not ideal, is to call Disney hotel reservations and see if you can book onsite before the 14th and then after the 14th - staying one night off site. Again, not the best option. If you want to stay off site for your entire vacation, and you want it to be at a nicer hotel, you could stay at the Hyatt Orange County. They do have an exclusive shuttle that takes you to
Disneyland and departs every 30 minutes.