A OzB Protip
When you book online with Wilson, you get an hour grace period either side of your booking - this means if you booked from 7am-10am, you can enter at 6am and leave at 11am.
Now you can use this grace period to your advantage in getting the cheaper evening rate, but 1 hour earlier - so rather than having to enter the car park at 5pm (usually when the evening rate begins) you can get enter at 4pm and still get the cheap rate.
Not sure if this works with other parking providers e.g. Secure Parking.
The real OZBargainer will park somewhere free and walk 25 minutes