LeiLani,
I've been to Disney World a few times and have an allergy to gluten. The Disney chefs are very knowledgable and helpful. When you call to make each PS, tell them that you have a food allergy (hint - tell them early in the converstation. If you wait til they give you the confirmation #, they have closed up the PS in the computer and have to look up the PS again in the machine. Some get cranky when they have to do that.)
They will write the allergy info in the PS and give you a phone number to call to speak with the head chef. You may have to leave a message on an answering machine, but they'll get the message. Just let them know when you're dining with them and what food allergy you have. All chefs were great! All the chefs would come out and talk with me. They would tell me what I could eat, and what I couldn't eat (either on the menu or in the buffet line). Then most chefs would offer to make me anything I wanted! Some even had special ingredients that they bought just for my particular allergy (they made non-wheat pancake mix. or non-wheat stuffing). Some of my favorite places to dine were... Chef Mickeys, Liberty Tree Tavern, California Grill, Artist Point, CRT, PSB, Yacthsman Steakhouse, ...
Good luck and I'll bet they treat you like a queen!
-Karen