Do codes historically come out the last week in April? If so when should I start looking for them? I have already booked my room - but am hoping to get a better deal
I'd suggest bookmarking www.mousesavers.com and watching the rates. You can sign up to be notified when there are changes made to their site. They post discount codes for Disney properties and special rates for non-Disney properties. Also, they offer a newsletter that has extra savings offered only to newsletter subscribers!
If you're watching for AP rates... they usually are more last minute and not guaranteed.