I've been parking there for 3 years, there's about 20+ crew members who park there, there's a mix of FA, and pilot for many different airlines. I usually give the driver $2 sometime $3 depending on how quickly they are, they always drop me off next to my car. All of the drivers are great people and friendly. Your first time you should go in uniform and tell them you want to leave your car there. When you fill out the form you don't have to fill out the "return date" they'll have your info on file after that. I only commute 3-4 time a month so the $2-3 tip is nothing.