We are catching a flight right after we debark, so my kids will need snacks and such for the plane. Can I bring snacks with us that are sealed, keep them on board and then take them off the ship, or will they make us toss them? What about opened snacks? I'm assuming we'd have to toss those, but just need clarification on if I should pack snacks for both to and from Miami or plan on buying snacks for the flight at the airport.