I am also very concerned about this. For years, we went to WDW between once and three times a year. It was the only place I felt safe for my DS with his dairy and egg allergies. We could spend a week, and he could eat safely everywhere! His allergist is the head of the Pediatric Allergy at Johns Hopkins, and has heard more good stories about patients going to WDW than anywhere!
So... we are also planning a long weekend at US. I'd love to hear some good stories about this at US. We're staying in a club room at PBH - usually club level food is off limits - they don't know what is in it, and it often involves fried foods, cheeses, and other dips and stuff. At least he'll have drinks there, and fruit and stuff. I don't usually even trust any breads at all, unless they can show me the packaging.
Do the counter service places really NOT have ingredients? I find that hard to believe, and also frustrating. I may call the hotel or US food service later to find out. We have a month. I'll also call the club concierge to see what they typically have, so I can pack some granola bars or something if need be.
Yes, gluten is a super hard one to avoid, but I would think they should be able to accommodate you somehow! It is a common problem - do you have celiac disease?
As a super happy side note, my DS WAS allergic to peanuts and sesame seeds, but was one of the lucky few who outgrew those early on! The peanut exposure was only through breastmilk so his level was pretty low (he never ate it while allergic) and by age 5 he outgrew it! Sesame oil used to make him break out for days with horrible rashes - now he can eat the seeds and all! There are so many great studies underway now, so hopefully they will both find a cure as well as find out why food allergies are increasing so rapidly.