For me, i study both engineering and Arts, so I have classes all over main campus.
Since, i am an engineering and value the importance of time and efficiency, i tend to tailor my travelling to uni needs depending on my timetable and my classes.
If i have a class in engineering in the morning, or any other class in the darlington side of main campus, I would get the train, get into redfern, then walk.
However, I have a class in the quad, wallace, pharmacy or any the buildings in the upper end of campus, I would goto Central station and grab a bus.
the walk from redfern station to the quad takes around 30 minutes using short female legs, mostly UPHILL the whole way. So bus = energy saving.
If I don't have many classes that day, say usually a friday, I might have only a 2 hours lecture in the middle of the day, I may drive to uni and park in chippendale. so anywhere around within the shepard st, abercrombie st, cleveland st boundaries.
It is free parking, but i have to move my car every 1-2 hours.
During semester it isn't too hard to find a park, during exams it is almost impossible.
During open days, i would HIGHLY HIGHLY suggest you grab a train.
if you wish to drive, drive to your nearest station and park and grab a train in.
FREE SHUTTLE BUSES PULL IN AT FISHER LIBRARY which is right next to the quad which is where the high achievers welcome "should" be. don't quote me.
If you REALLY feel the need to drive, expect to pay $24. or the need to move your car every 1-2 hours, or get fined, or get towed.
if you turn up before 7am, you can get free all day parking on shepard st university side.
but if you get there at 7.01am it will probably all be gone.
Good luck!