That sucks for the glider, parachute, and ultralight businesses that are based there. My wife and I took a flight in the ultralights a couple of years ago, it was the first time I'd been in a weight shift aircraft since hang gliding in the 70s.
My pilot was the owner of the business, we swapped old stories about the Sandias, Torrey Pines, and other places we had both flown. He is a CFI, and the flight was classified as instruction, so I was able to log an hour of dual.
The aircraft were super nice, and I was told they cost almost $50K. He has a big investment in the business, and if Dillingham closes he'll be SOL. Doesn't seem right to get four months notice you're getting the boot.