Hi Susan!
Congratulations on planning your upcoming vacation and thanks for visiting us at Disney Parks Moms Panel. Yes, you can absolutely book your vacation and add any special offers that you are eligible for at a later date. In fact, I do this with all of my Walt Disney World vacation to help stretch my Disney dollars.
A couple of things to consider when planning your vacation for 2014 is while Disney's free dining promotion was offered in 2013, there is no way to know for sure if it will be back next year. Don't let that discourage you though, Disney frequently offers many discounts that might possibly save you more money than the free dining promotion. Go ahead and book your vacation now and once a special offer is available for your resort and travel dates, you will just need to call (407) W-Disney to have the special offer applied. The discount will be deducted from your remaining balance or refunded if the balance has already been paid.
Make sure to check
Walt Disney World's Special Offers page frequently as your trip gets closer for any information on the Free Dining Promotion or other special offers. You will want to call as soon as this discount is released in order to stay at your desired resort and room location. With each special offer, only so many rooms per a resort will be eligible and once those rooms are sold out you might have to relocate to another resort or upgrade your room type in order to take advantage of the discount. Be prepared to call early, reservation lines open at 7 am EST, and whatever you do don't hang up. You might have a bit of a wait on the phone, but the money and the fabulous Disney tunes you will be hearing makes it all worth it!
I hope that his was helpful and please let me know if you have anymore questions!
Happy Planning!
Mandy