Birthdays are beautiful things and deserve to be celebrated. Have a cake at home, by all means. Go all out and have a chocolate-peanut-butter-meringue-almond-butter-cashew-pistachio cake topped with buttercream chock-full of dairy and artificial colors. It's your party. But don't complain because your kid can't have that at school, where they're supposed to be focused on learning.
When it comes to holidays, Thanksgiving has the best menu, in my very humble and completely unscientific opinion. We're talking all of my favorites: mashed potatoes, apple pie, dinner rolls, turkey gravy, stuffing... Notice a trend here? Gluten. Wheat. Dairy. Gluten and wheat and dairy in (almost) everything.
For those people who do have a food allergy of any kind, dining out and traveling can be incredibly stressful, especially those whose children are the ones with the issue. There are a ton of factors and scenarios that those who aren't affected by a food allergy never even think of, but in true Disney-fashion, they are one step ahead of their guests.