Since you've decided to use Disney's port to airport transportation, what about doing a port excursion to the Kennedy Space Center with drop off at the airport? The space center is very interesting and a visit is worthwhile.
If you still get to the airport hours before your flight, I suggest going to the Hyatt Regency airport hotel's rooftop pool. You can relax, a quick swim, have your last vacation cocktail and a bite to eat.
I'm from Massapequa, many moons ago!