Answers to your q's are forthcoming, I'm sure. I have no experience trying to keep a stealth garden, but I have been an apartment manager/owner.

Take a look at your rental agreement, and see if the management or maintenance staff have permission to do occational property checks and inspections. Sometimes it says they need to give 24 hours notice, some say nothing about notice.

Besides requiring stealth, the problem with growing in appartments is, if something happened in another unit, lets say a water leak...even if your unit isn't the one leaking, they may just walk right in to check, and find your hidden treasures. For some managers or maintenance staffers, it would likely be no big deal. For others, they usually have 911 on speed dial.

Also keep in mind...all occupants could be held accountable.