You won't have to change a thing.
Two years in a row now, we had our entire packages booked-resort, park tickets, and the Dining Plan-also had all of our ADRs booked. When the Free Dining Promotion came out, we simply called and gave the code. They simply deducted the amount we were going to pay for the Dining Plan from our balance and WHA LA! Free Dining! 
You won't have to change a thing.
It is simple when you think of it from Disney's perspective. Discounts are offered to fill empty rooms. All of the discounts offered (free dining or otherwise) are for a limited number of rooms at each resort. When you "apply a code" to an existing reservation there must be a discounted room available at that resort in the same room category. If there is then it looks as if they just reduced the price of your reservation (or deducted the cost of the DDP in this case). If there isn't then you have to decide to switch room categories (if there is availability) or switch to a resort where there are rooms. This is why on the codes board some people recommend not making reservations in the hope that a discount will become available. If all of the rooms are booked Disney doesn't need to offer a discount at that resort.You were able to stay at the resort that you already had booked, same room and everything? We are booked already too, full pkg with the dining plan but I have heard that sometimes you can't keep the same room or even same resort and you may have to switch if that room isn't part of the rooms designated for the dining plan. I also have heard, just like you did, they just deduct the cost of the plan off your package. It's so confusing
Originally Posted by lynninpa
You won't have to change a thing.
You were able to stay at the resort that you already had booked, same room and everything? We are booked already too, full pkg with the dining plan but I have heard that sometimes you can't keep the same room or even same resort and you may have to switch if that room isn't part of the rooms designated for the dining plan. I also have heard, just like you did, they just deduct the cost of the plan off your package. It's so confusing
No problem, it seems that it does change with the seasons and resort room types that people have. We are going no matter if we can get free dining or not. It is our anniversary and this is what we planned to do anyway. Having the free dining would be nice to save some money but it's booked already and we'll just wait and see what happens. If we have to switch something then we will, room type or view or whatever, if not than we will just stay where we are which would be the ideal situation. In the meantime I just have to stay glued for that official date that free dining gets announced
Thanks.
No. You have to get at least a one day pass. Everyone in the room has to get the same pass.
