Animating multiple objects that should interact with eachother

Hello everyone, lately I haven't been able to wrap my head around a little newbie issue with animating. My issue is that I have to create an animation (using Unity animator) of the player's camera walking into a closet to hide and viceversa. Since the main camera is not even a child of the closet, this is not possible to pull off (I think) using a single animation file and animator event. The only solution that came into my mind might not even work because the animation should be valid for every closet in the level, so saving global coordinates in the animation file is not even a good idea. Is there any professional approach for this small issue?