Were the two large hangars empty or did you just see no aircraft coming and going?
Last time I was there I called the caretaker (Col Campbell - pictures in attached article) prior to my arrival, he arrived within seconds of me landing, offered me refreshments, collected my nominal landing fee, offered a tie-down location, checked that I had a ride into town and offered any assistance as required.
Couldn't have been happier.
It was owned by a chap, perhaps George (can't remember his surname - good friend of Dick Smith), who used to operate his Citation or similar into there but now doesn't fly after a small stroke, so gets flown in by his son from Essendon - I think he owns Execujet or one of those similar companies out there. I'm sure someone else has more information on that one.
Great Lakes Airport