Will try to do so.
So far I found medical library opens till 10.30pm on weekdays.
I'm not staying in the campus. The place that I could park my car is damn far and the road to medical faculty is too quiet (as you know medical faculty is on top of a hill)...

I usually park at Exam Hall car park, sometimes monkey hill and Building T (near electrical engineering faculty).
I think there are spaces for parking in front of the 2nd college entrance gate if you are lucky enough.

I don't think the university patrol will check if you have sticker (trust me, they don't bother as long as you don't create traffic problem, don't park at someone's allocated parking lot and no one has made any complaints. They might only stop you when you enter from certain gates, e.g. INTAN gate and sometimes pj/kl gate during weekend if you don't have the sticker). But you do have to bear the risk of your car being clamped especially when you park at the roadside.

My advice is, just get a sticker. It saves you from worries and troubles. All you have to do is to apply online, get your documents ready and pay the RM3 (cheap rite?) at 12th college during office hours.