I've done it a few ways.....last time I was very pleased with
Airport Parking Reservations.com: Discount Airport Parking Reservations at airports nationwide and kept the car at the Renaissance Orlando Airport Hotel...about one mile away from the airport. They take you to the airport and return you to your car when you fly back. You park your car in their gated parking lot and lock it and YOU keep your keys. It only cost about $3.00 per day.
Of course there are many options....some a bit more pricey....
Hope this helps....Frank