Walgreens and lots on South Kirkman have lot spotters. The tow companies pay people to just watch and wait for someone to leave the property. Even if you just run to Burger King to get a sandwich. They don't play.
As for parking in the garage overnight.. Done it lots of times. But from working in parking tolls and security at the park, they do notate everything. 1 night is cool, even once a week, but if they think your scamming they will wait until the parkings cleared out and tow your car out. Had a co-worker whos starter went out, and talked to security, but they told her if it was there 3 days it would be gone. Sure enough it was.