LOL
Have you done the maths on this at all?
Torquay is the start of the GOR.
Lorne would be the destination.
Dingley Village -> Torquay = 1h45m
Torquay -> Lorne = 45m
Lorne -> Torquay = 45m
Torquay -> Dingley Village = 1h45m
Departure time: 10:30pm
Return time: 3:30am
Actual Return Time: Daylight and the rest of your weekend is gone.
Even if you've got a perfect run of traffic: Congratulations! You've got a very late, very boring cruise with no scenery because its dark. If you want hills, there are heaps on this side of the city.
And Phillip Island, why? Its boring highway down the M1 and M420. Then you get there and see nothing. Phillip Island is a daytime cruise destination, with beaches and shops.
I could go on, but at this point even my fingers don't want to type anymore in response to this cruise.