It's confusing trying to figure out the parking situation at an airport and ways to get transportation. There are a lot of categories such as short-term airport parking, long-term airport parking, ground transportation, cabs, limousines , shuttles to rental cars etc etc.
Stop by and see what the options and distinctions regarding airport parking include. Keep in mind that if you park at the airport you will be then taking a shuttle to get to your car when you come back. There are different terms at various airports such as economy to signify a lot that may be further away but less expensive.
Off Airport Parking Options at www.offairportparking.org