The powdered donuts work well(especially if you purchase the Little Debbie brand in a box). They are very sugary, though, so we pair them with fruit and oatmeal or cereal as an extra "filler". Cheerios, mini wheats, and Honey bunches of Oats are our cereals of choice, and we add blueberries or sliced strawberries and bananas to the cereal. We usually add peaches to our oatmeal. A week before I leave, I slice the peaches and strawberries, and freeze them in a ziploc bowl, and just add them to the cooler before we leave. I either purchase not-quite-ripe bananas before we leave, or I purchase them at Winn Dixie once we arrive. I always purchase a cantaloupe that I cut up the first day and store in a ziploc bowl in the fridge(or cooler), as well as several pounds of grapes which we use as snacks as well as breakfast food. Bagels are quick, as well as english muffins, blueberry muffins, poptarts,and toast(provided you have a toaster). I once made a breakfast yogurt cup that consisted of yogurt, fruit, and granola, but it took a while to fix 8 of those! We usually have a kitchen(we're
DVC members), so I make full breakfasts most mornings(sausage/bacon, eggs, croissants/biscuits, cinnamon rolls), but I try to fix something quick if we're planning an early entry into a park. I once pre-made biscuits the night before(and stored them in ...you guessed it, a ziploc bowl!), and we added canadian bacon to them in the morning and heated them in the oven in aluminum foil for @ 5 minutes. I assume we could have heated them in the microwave, too(I hear you can use the microwave at the food courts if you want to). Sandwiches(of any kind) would be easy to do in the mornings, and the kids could eat those on the way to the parks if you're rushed. Sorry so long..I hope this helps.