For returning to MCO, ME will pick you up at your resort approx. 3 hours prior to your flight time. So choose a flight that would line up with the time you'd like to go to the Hyatt, even if it's not flying to your home airport.
It may be hard to find a flight late enough to suit you. Even if you can find a 9pm flight home, they will pick you up at 6pm. That might be earlier than you would choose to end your time at WDW so it may or may not be worth it to hire a private transfer.