We are only two weeks away from our first Disney trip!! My sister is going with us and this will be her fourth trip. She has almost everything figured out but she has never went with more then one child or a child under 7. We are taking all four of my kids (11,9,8,2) We do not want to have a lot to carry around all day but Im worried we will be in the park and be missing something important. We will have a small stroller for our two yr old and a couple backpacks. The two yr old is potty trained. What are somethings we will need to have on hand! TIA!!