I don't want to be pedantic, but much of this advice works opposite for some kids - type 1 diabetes is a very much "Your Diabetes May Vary" type of disease.
For instance, there's really no reason why a child who is high cannot exercise if they don't have ketones. Exercise AND Ketones do not mix but exercise will not bring on ketones. For many kids exercising is a great way to bring down bg's.
For many kids, excitement can bring on lows just as easily as highs and for many kids it varies from time to time. for hypos, you should ALWAYS have glucose on your person. Always. In a pocket, tucked in your waistband, tucked in your bra but ALWAYS on your person. At disney you can always have your bags with you, so you should never be without your diabetes supplies.
For pumps, simply wearing them under your clothing should not make them overheat. NEVER hand your pump to a CM always keep it with you. ALWAYS.