Here is a cache for the travellers and the good folks who volunteer to drop-off or pick-up those globetrotters.
This will give you something to do while you hang about the airport.
Parking is nightmare unless you pay or take a long hike. GZ is on the walkway between International and Domestic and is under cover. No need to look suspicious at GZ.
The cache is in a magnetic key case and only contains a logbook. No room for anything else really. BYO pen and please, please, please replace carefully.. 
Please replace cache as found and out of sight. This is critical to it's long term survival and enjoyment.