Orlando International Airport - Terminal Parking is currently not accepting reservations on AirportParkingReservations.com.
Very convenient, but expensive. Wouldn't use it for more than a couple days, to be sure.
Just like any other airport parking lot. Expensive, but super convienent. If you have a 1 or 2 day trip it may be worth it to pay for their parking, but anything above that, $17 a day REALLY adds up fast.