Comfortable shoes, shorts, jeans or long pants and long sleeve shirt/sweatshirt for night time it may get a bit cool. I always bring a black blazer and black pants and a dresses/or skirts that does not wrinkle and black high heel shoes. You can wear the heels with the pants and blazer in the evening or the dress. Kakhi pants and loafers are always good. It also depends on where you are going to be dining at night. Disney is pretty laid back and casual. I would pack according to what you will be doing at night - the daytime attire is pretty much self explanitory. Don't forget the sunscreen!