My daughter is also going on a school trip in April with this same itinerary. Because her trip includes two meals at the parks I plan on setting a budget of $200 - $50 per day for park days and an extra $50 for the travel time up and back Snacks are usually $5-7 each (some are less) and I know she will want things like Ears and a shirt. While I would expect her to come back with some money left over, I seriously doubt she will
. That would also be enough money for pay for meals (quick service) if your trip doesn't include them, but would leave less for spending in the stores. I will probably also tuck another $100 in her suitcase that is only for emergencies - she would have to call me for permission to use it.