My 3yo daughter loves to dress up! We try to limit her to just the character meals, but she begs to wear them all day. If it's one of the special party nights, such as MNSSH, P&PP, or
MVMCP, we'll let her wear the dress for the entire event.
We bring a dress for each day-- I also stocked up when disneyshopping had a big sale. Many of the dresses are too big, so I hemmed as necessary-- I hope to get a few years out of them!
She gets so excited and feels so special when CMs compliment her.
We recently purchased the Alice dress while there-- it's probably the only washable dress she has. Not a princess one, but she loves it just the same. She wants me to find a Mary Poppins dress next.
One tip: for transporting, use large ziplock bags. Squeeze out all the air and it really compresses! It also helps contain all that glitter and will keep it clean when you carry it around.
We skip the fancy princess shoes and go for mary-jane type everyday shoes.