We went to Disney right after our 9/30 Wonder cruise - we had to spend the night someplace because we couldn't fly out until the next evening - so I got us a room at Port Orleans.
The Disney transportation to the park didn't leave PC until around 9:30 or so - we didn't get to the park until around 10:30a.m.or so. If you're going to be at the airport an hour before your flight - and you should really be there two hours before - we still waited in a long line and we were flying first class on the way home - the lines through the scanners were very slow - I never like to push that issue, you know?
That said, I wouldn't spend the money on the park for that short of a time. Another option is to get a "day" room at the Hyatt in the Orlando airport - you can check in at 10am and use it until you leave - use the pool, take a nap, get room service etc - it's $75 for the day.