Have you thought about ordering some Premier Protein and having it shipped to your hotel? I'm not sure where you're staying. I know on the Disney property there is a grocery delivery service we've ordered from in the past (gardengrocer dot com). You can order a variety of foods. We've ordered healthy Snacks and even cases of bottles Water to take into the parks. Much cheaper and easier to control your snacks.
I will be going to Disney too. I will be 3 1/2 months post op. Thankfully my mother lives in Florida and will be meeting us the first night for dinner. She is going to bring me a case of Premier Protein and a case of Water. I plan to have a Premier Protein every morning for breakfast. We do not have the dining plan. I have already cancelled all of the buffet meals we had planned. We will still do a few table services and I plan to get the highest protein appetizer I can find or a salad with grilled chicken. Hoping I can have salad at that time. At the quick service meals, some have salads, or I will do a sandwich and not eat the bread. Best of luck to you. We go to Disney every summer, I am looking forward to being a little lighter this year and not hiding behind my children for all of the pictures.