I don't think anyone has suggested a
ddp calculator yet?
Mugsymugs, the ddp locks in an average price per meal and snacks, and also gets you a cup for free refills of soft drinks at resorts.
If you do not choose to use the meals or snacks you pre-pay for, you lose money.
If you do not have a plan of maximizing your average prices for meals and snacks that you have locked in, you could lose money.
If you throw away any of the food that you have pre-paid for, you lose money. A lot of ppl (I was definitely one) are not aware of the pretty big portion sizes at a decent amount of the qs places.
If you do not make use of the refill mugs, you will lose money.
The well known ddp calculator can give you a decent
idea of prices,
You really need to just sit down for a while to figure out what places you'd likely eat at, and what you'd order. For my family, it would be VERY hard to make the ddp worth it, even if it was free. After seeing the amount of food, and the time it takes for table service compared to what we eat, paying out of pocket for a few TS meals, and planning several better quality qs places works out much cheaper, and more our style. A lot of people buy in to a romanticized, "all inclusive vacation" feel of the dining plans (which has its merits, I really don't mean that to sound negative) OR, they know it will work out very well for their vacationing style, and they plan it out well, and make it cost effective. A suggestion for you would be to figure out where you'd eat, and what you'd order, using this:
https://www.distripplanner.com/
And after you do that, depending on how much $ gain or loss you are likely to incur, get more granular. You might wind up saving a bunch of money using the ddp, but just don't be surprised if you look at the numbers and think it's far better paying for your meals out of pocket. There's really no reason to lock yourself into losing money, you can see the prices of what your family would likely order, and then compare that to the price of the dining plan. It's not like an all inclusive resort vacation where you don't know how much the meals cost, and have no idea if the average price per meal they are charging you is crazy or not.
Also, as others have stated, for QS/CS meals, you can order whatever you'd like. My wife and I split a few qs kid's meals as snacks or light lunches, no big deal at all. (Again, some of these qs/cs meals are much bigger than we expected, even after reading the boards here and being warned about them.) Good luck to you!