Thanks for the responses everyone.

Visits are always announced, but frequent enough, giving at least 24-72hrs notice. Because there's approximately 50 units in this building they specify hours between 8am-5pm for the given day so as to accomodate the necessary work involved. What worries me is that most visits are ongoing while me and my wife are at work.

The cabinet will be in an open location however I considered rigging casters on the bottom side so I could quickly roll the unit into the walk-in closet if needed. It can't stay there because my wife has way too many clothes

If we are both working I thought about posting a sign on the bedroom door stating I'm working nights and am sleeping. Please do not open my door. My super is fully aware that I work shift work and I'm confident that this would do the trick, I'm also confident he's too lazy to check the underground parking to see if our cars are there.

Another trick I have been thinking of is running one of those DIY "ONA" fans on those particular days as well.

How do these ideas sound? Keep your suggestions coming. Hopefully won't be long before I start my own log.