I just got based there for XJT and there is no option if your employer doesn't have a contract with them. I contacted the airport directly and they said before a contract was in place I couldn't do any kind of employee parking. My only option was to go with an airport hotel that was 30 per month.

There is no sticker or placard that you show in your car. So if you can follow someone into the lot then I doubt you will get towed.