Hi Michael!
Disney does often offer promotions throughout the summer months at Walt Disney World, but you don't need to worry about losing out on a good deal. One great resource I keep an eye on is a site called MouseSavers. This site lists all of the current Disney World Discounts, and even a chart of "historical discounts" that list what promotions have been offered in the past.
If you'd like to get a jump start on planning your summer vacation, you can go ahead and reserve your vacation now. Then, if a new discount is announced, just contact Disney World.
Disney reservationists are almost always able to apply a newly announced
discount or promotion to an existing reservation. As long as the resort
and room type you are interested in is available, you shouldn't have a
problem applying the discount. If your first choice resort is
unavailable for some reason, you are usually given an option to change
rooms or resorts- most often without a charge.
Keep an eye on the
Special Offers
page of Disneyworld.com and be sure to call 407-939-7675 (or contact
your travel agent) if you see a new discount announced. Just let them
know that you'd like to apply it to your reservation when you call.