My little guy is 16 months old and he pretty much eats what we eat now. At home, I do make sure he gets plenty of veggies and fruits, but I will admit that he eats his fair share of chicken strips, too.
When we were at Disney, we did quite a few buffets and he always had penty of good and healthy choices from those - veggies, etc. When we did table service he usually just ate off our plate - some of our chicken, fish, veggies or whatever. I also did a grocery stop and picked up fresh fruit, etc. for the room. This worked really well when we were there in May (he was 12 months) and I am planning on doing it this way again in December.
My little guy is still very tiny (was a micropreemie) and I won't bother buying him a children's meal in the restaurants. (He'll be 20 months when we go in December). It's not because the children's menu isn't healthy (although I certainly agree it isn't the best), but because he won't eat nearly that much.
My little buddy is still nursing very frequently, though, and that helps ease my mind some as far as the quality and quantity of food he eats. At least I know he is getting some good milk.
Have a great trip!! I think you will find there are plenty of good options for you. Paul was never a "baby food" baby really, either. We just waited until he was 9 months old (6 months adjusted age) and then started him on pureed real foods like fresh veggies and fruits. We never did the jarred thing.