Hello Carol!
Welcome to the Disney Parks Moms Panel. When it comes to
special diets, the Walt Disney World Resort goes above and beyond to accommodate Guests.
My husband also drinks lactose free milk, so I am happy to tell you that it can be purchased at all of the Disney Resort hotels. Many locations inside the four theme parks also sell lactose free milk, so you should not have any problems. In addition, gluten free options are available at several dining locations throughout the Walt Disney World Resort. I am sure your sister will be pleased with the selections.
One important tip that I have is to indicate your dietary restrictions when making
dining reservations online, and informing a Cast Member when making a reservation over the phone. To make a reservation, call (407) WDW-DINE or (407) 939-3463.
When you arrive at your dining location, let Cast Members know about your restrictions as soon as you arrive. You can always talk to the Chef if you still have concerns and questions, and you may contact Disney Special Diets in advance at Special.Diets@DisneyWorld.com if you feel more planning is important to you and your family.
It has been a pleasure assisting you Carol. Please stop by the Disney Parks Moms Panel with more questions.
Best magical wishes,
Thiana