some of the hardened shelters are overgrown with trees and potentially making you unable to use them, I've tried some of them.
On the northern side of the airfield near Rwy 25 parking spots 45 to 48 are overgrown
On the Southern side of the airfield parking spaces 54,56,58,60 and 61 are overgrown where parking spot nr 60 causing the plane to explode