I make it a practice to put and empty hangers after unpacking on the closet floor. And they stay there until debarkation morning - they get joined by used-but-now-empty hangers as I pack, and then when I wake up debarkation morning I put them all back on the rack.
I like your thinking !
UNfortunately our closet floor is filled with carryon bags. But I will think of something else if we go through that again. At least now I know what the sound is so I know what needs fixing right away.
SW