When I go to the parks, I like to leave extra early so that we can be there for the opening show and for rope drop. That means we usually leave the Fort around the time they start serving breakfast at Trail's End.
Normally, we grab a quick breakfast at our cabin/campsite of the heat and eat variety. We like frozen pancakes with fully cooked packaged bacon, frozen breakfast biscuit sandwiches, frozen breakfast burritos, etc. Then when we get hungry, we grab a snack inside the parks to hold us over until lunch.
Like others here, I like saving breakfast at Trail's End for the morning we are leaving so I can focus on packing.
Of course, meals at 617 are always delightful but I prefer swinging by there for lunch or supper, lol.