I'm allergic to all tree nuts, water chestnuts, coconut, and scallops, as well as all of their oils.
I've eaten at just about every restaurant on WDW property.
As soon as you are seated, tell the server you have allergies and don't order anything without speaking to the chef first. They are generally very knowledgeable and helpful.
Of course use common sense like avoiding desserts at buffets (tell tehs erver that you need "fresh" desserts brought from the kitchen to avoid cross contamination.
Almost none of the breads are made on property, so be careful there.
At Citrico's one of the breads has nuts in it, the srever will bring you a basket of the other bread cut fresh and kept seperate.
Boma was a "scarey one" for me--3/4 of the dishes have one of my alergins in it. They did offer to have something made special for me, but that was after I had already eaten quite a bit of the same three items that were safe, so I declined...I wish they ahd offered that from the start.
Kona Cafe was great about the allergies. The buttermilk biscuits in all the breakfasts are nut free-frozen from Pillsbury. I always opt for them rather than breads.
The biggest problems you'll face are cross contamination issues at the buffet (don't be afraid to ask for something fresh from the kitchen to avoid problems) and ignorance. Some chefs don't realize that most white chocolate is made with almond oils, and some don't even know there ware walnuts in pesto sauce (that was on the
DCL Magic) Last year a chef at the Tusker House told me there were nuts ina specific item, this year I was told by another chef no nuts. Needless to say I didn't chance it.
If you have specific reatuarants you are thinking about, feel free to ask and I'll give you my experience, although it might be different from yours--I've had night and day experiences at some of the restaurants, although others have always been fabulous.
Anne