I just had a look at the class times for biology. Here is what it says:
Class hours: School Centre – One three-hour lecture/tutorial class, and in alternate weeks either a three-hour practical class or a computer-based activity.
On Campus – Three one-hour lectures over three days. One hour of theory workshops and two hours of practical workshops per fortnight, one hour of problem-solving classes per fortnight, two hours of pre and post laboratory activities per week, twenty-four hours of e-learning each semester and two hours of online independent learning tasks and activities per week.
Please note: Practical sessions will be held at the University of Melbourne, Parkville campus. Dates and times to be advised.
I'm not quite sure what the last bit means, but I think if you choose to go to a school centre you may still have to go to Parkville to do pracs. Also note that you will have to go to "three one hour lectures over three days" if you choose to go on campus. Are you willing to make that sacrifice?
The other members Damoz quoted (Alvin, nliu1995) do UMEP maths at school centres so they don't actually have to go on campus. The benefit of that is you might be able to cut down on travel time, but if you want a proper uni experience then go on campus.
For me, Accounting is only held on campus on Wednesdays 4:15-7:15pm including a 2 hour lecture and 1 hour tutorial.
Workload is minimal, spent about 1 hour per week in semester 1 (mainly doing online MCQ tests which were compulsory). Semester 2 I've basically spent 0 time on uni so I have 6 days to cram for my uni exam after my last vce exam
I guess the thing in uni is that no one pushes you to do anything, it's all up to you. The workload can be as heavy or as light as what you want.
Hope that helps