If you are going to an amusement park, make sure your hair is tied back. I think you should a loose messy bun with your bangs held back with a hair pin or a cute hair band. Since your hair is curly, the messy bun will look better because couple of curls coming out from here or there, will look really sexy. If not that, than you can go with a side pony tail, or a side braid (depending on how long your hair is). Try doing a french braid or fish tail braid if you can. Try a high pony tail by teasing your scalp hair. Its a very nice summer look and is very easy for a theme park date/hangout. If you want to leave your hair open, then just pull your hair back with a cute hair band and leave the rest of your hair open.
This might help you out:
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