I'm not a huge eater, but I found that with all the walking I did, I pretty much demolished all meals that were put in front of me, ha ha! I do agree that some CS places do give you a ton of food - Tangierine Cafe is one of them, along with Cosmic Ray's and Sunshine Season. Also, the CS in Norway gives you a big sandwich, cup of soup, drink and dessert for a CS credit - that could probably be split. The other one is Starring Rolls - the sandwiches have a TON of meat in them, and you can split one of their outrageously huge cupcakes as your dessert credit.
My thought is... it's vacation! Plan on buying a few snacks OOP and maybe a side dish or two, if you can afford it. For example, we got 2 adult CS meals and 2 kids CS meals at Flame Tree BBQ, and paid OOP for fries and rings - definitely worth the $8 OOP. That fed me, DH, DS1 (9) and DS2 (7) for lunch and we ended up getting something small back at the resort for dinner later.
Have a great trip!!