I was there last week.
It is a small AirPort, but they work slowly, even with Self-Check-In.
I would not go to the city. Try to get the 2 Traditionals and the Multi at the AirPort.
http://www.adventure-caching.de/geocaching-shop/product_info.php/info/p211_US-Munitionskiste-11-6-Liter---Big-Tube---gebraucht--wasserdicht.html
Hat damit jemand Erfahrung?