Howdy Kathleen! We have stayed club level at Disney's Grand Floridian Resort & Spa, Disney's Contemporary Resort and Disney's Yacht Club Resort.
I have witnessed, first hand, accommodations being made for Guests with allergies.
When booking your hotel, you might consider staying at the Grand Floridian in the Main Building. From our experience, you will find a wider variety of food and beverages available to Guests than at some of the other Resorts (though they are all wonderful).
While all of this is not necessary, when you book your stay, I would suggest that you let the Cast Member know about any allergies so that it can be noted on your reservation. Then, once you are contacted by the Concierge Cast Member prior to your arrival, you might mention it again.
You can probably skip the 1st two suggestions I made but a must do for you will be to speak with a chef at your resort when you first arrive. They will set you up with appropriate club amenities for the length of your stay. In typical Disney fashion, they will go the extra mile to ensure each Guest has a magical stay.
As I am sure you know, Disney has made great strides in the past few years to provide excellent culinary options for Guests with
special dietary requests. I think you will love the Club Level amenities!! While all of the Resorts are wonderful, staying Club Level does add some extra magic to your vacation.
Thanks so much for your question and please let me know if you have any further questions. Have a magical day!!