We just shared with our DD2 (she was 26 months at the time). Between the bread, appetizers, buffets, free meal at CRT, milk, and sharing, she was fine. I also brought snacks (nuts and goldfish) and little boxes of cereal for between meals and early mornings. On the DDP, you can go to the gift shop in your resort and buy a large milk (larger than at the CS place in the resort) with a snack credit. It is a much better value than the milk in the CS place. I kept that milk in the fridge in our room (fridge is free in mods and deluxe resorts), and DD2 could drink it in the mornings.
Unless your 2 yo is a big eater, I wouldn't worry about it. If she is, you can buy kids' meals as needed.