Hey there! I have We have multiple allergies in our house too! WE strictly avoid, gluten, Dairy, Peanut, egg, and soy. WE use egg replacers based on what we are cooking. For sweet baked goods like pancakes, cakes, cookies, etc., we always repace each egg with 1/4 c. of applesauce or mashed banana. For other bread items we use uflavored gelatin powder. use 1 teaspoon for each 1 C. GF flour used. If it is used for coating we also use pureed fruit or italian salad dressing.
In general:
For leavening: try baking powder
For moist: try pureed fruit
for binder: try Gelatin or flax seed
Tips: Don't fill muffins cups just half way - fill them about about level with the top of the pan.
Bake - don't fry your foods- the coating tends to just fall off