Hi Christine,
If you book a Disney vacation now and a
Special Offer is released that is valid for your dates of travel, you can simply call 407-W-DISNEY and request that they modify your existing reservation to reflect the discount.
There are a few things to keep in mind:
1) Changes can be made up to 45 days prior to arrival without penalty, so you'll want to make sure it's outside of that window.
2) You'll want to make sure you have not paid your balance in full. I recommend making payments on your reservation up until the final payment is due (45 days prior to arrival).
3) The number of rooms available for special offers is limited. You'll want to call as soon as possible upon seeing the special and be flexible in your resort preference. You may find that a room is available in one resort but not another.
Hope this helps and that you have a wonderful vacation. Please let me know if I can assist you further,
Kaylene