That far out you should be fine anywhere. Most places will have a simple protein choice, even the majority of quick service. As long as you stick with protein heavy choices you'll be good. I'd skip any kind of card asking for ordering off the kids menus. Yes you'll be paying for food you won't eat, but you'll have a whole lot more choice and better quality choices. Even at someplace like Pecos Bills you could skip the sides, skip the bun and eat part of a hamburger patty. I'm 5.5 months out from my surgery and have never had a problem ordering at restaurants.
How sensitive are you to sugar??? You might not order a dessert, but one or two bites from someone else during the week would give you a taste!! There are usually one or two kiosks in each park which also have healthier snacks like fruit or cut up veggies. Wonder if any of the little packaged snacks are nuts...hmm, I'll need to look at that before I go in February!
Good luck and have a great time!!! Don't know about you but I'm really excited about going to Disney at a significantly lower weight!