that's a much better tactic than mine, which is to approach from GWR, turn into Otago street and up towards the school. I park there if I'm planning to go to the gym, if I'm not I just head up and round to Lilybank Gardens and 99% of the time there's a space there.
If there's not then I head up QMD too and park by my old flat on Kelvin Drive.
I didn't know University Avenue was 30p an hour though, I figured it was 50p like everywhere else I don't park. I may start turning left down Park Rd and checking out the spaces that way from now on, but since I usually have a 9am lecture, there's ALWAYS space at Lilybank Gardens, and since I'm a maths student it's handy for the three places I use most, Maths building, QM and Boyd Orr.