My husband and daughter (6) and son (9) are staying at the Rosen Inn Pointe Orlando in International Drive from the 3-17th July. We are not hiring a car and will be using the Lynx bus service for visits to all parks. We have tickets for them all including Busch Gardens. I have been wondering what are the essentials to take with me on a day out? Thinking money, tickets, bottle of water, suncream and possibly towels if visiting a water park. Any advice about the size of bag I am going to have to buy to carry about with me all day and what I really need to be taking each day?