Good grief! They're no adults at Disney World!
If you can, get your tickets / passes at AAA! They saved us 800.00, got us free Park Hopper passes, and an extra day, free!
We stayed at Fort Wilderness, pigged out at the Trails End Cafe buffet, and other than sore feet, acted like we were in our teens again (we're 66 and 68). The best part of the Park Hopper passes was Epcot in the morning, then nap, then Typhoon Lagoon, and back to the campground for dinner and the Electric Light Show at the lagoon... typical day.
Whatever else, have fun and be safe!