How do you get to and from the airport? Our MO is to drive our car to the airport and park at an offsite location like AirPark or the Parking Spot. This usually works quite well despite the fact that you need to leave slightly earlier (then if you were taking a car service) and sometimes you need to wait a bit upon your return to be picked up. (This is only really an issue for us in the winter when its cold outside!)
If you also use offsite parking locations, know that AAA members can save 10% or even more depending on current offers. You can go to AAA.com/TheParkingSpot to view current offers.