There are cars parked on the grass as you exit the airport. Are they parking there for free, or if they are paying how much is it to walk just a bit further to your car?

Your car might be impounded if you leave it in an unmarked space (the grass). you know that, or you would not be asking! Call the airport authorities, they know about the cars.

These cars have been there for weeks. They are mowing around them. They are on the North end, after you drive past the rental car area. We are looking for a cheaper alternative when we leave our car there for 3 to 4 weeks.

They're most likely waiting for an airplane to land has been a lot of delays there. You can park for two hours for free inside the lot after that it's a maximum of $11 a day

Hope you read the sign for parking for free probably picking up a friend or relative