The New Orleans Louis Armstrong International Airport has announced a 350 car Cell Phone Parking Lot. Good idea.
I have a better one. Go sit in the Airport Hilton Bar. I've been doing this for several years. It's relatively cheap, comfortable and they usually have fresh popcorn. You can get to the airport in a couple of minutes, long before a passenger get their bags. I usually wait until I have a call confirming the bags are in hand.
I hope 350 people don't start using the Hilton Bar. It will be very crowded.