I have some experience with this--dd10 has allergies to peanuts, tree nuts, wheat, mustard, peas, and spinach (she used to also be allergic to oats), and dd15 and I were diagnosed with celiac disease about 7 yrs ago, so no wheat, rye, or barley for us. It seems overwhelming at the beginning, but it's nots so bad, and your son should be able to eat most of the foods he likes. For starters, turkey is generally safe (just check the labels for any fillers). Just don't put the stuffing in the turkey-- cook it separately, or, if the rest of the family insists, and he likes white meat, we just usually cook a small turkey breast for those who can't eat wheat. Cranberries are safe, and have him choose a vegetable that he would like, and just keep that simple for him. Rolls at a little tougher (we haven't really found any we like yet), but if he like cornbread Kruseaz has a gluten free version that should be really good ( haven't tried it yet, but recently discovered their gluten free muffin and brownie mixes that are delicious!), or just have some bread for him (Udi's brand us really good). Potatoes and sweet potatoes are safe foods, so no problem there. If you have a Woodman's store nearby, you can even get a personal gluten free pumpkin pie in their gluten free freezer section, although I have not checked all the ingredients in that and it may have some of his other allergens. I hope this has helped and you and your son have a great Thanksgiving this year!