Bacchus Marsh to Port Melbourne

Hi all, just wondering what the road conditions are between Bacchus March and Port Melbourne. The reason I ask is that a relative of mine is telling me that I will have to go through Melbourne (due to roadworks) to get the to Spirit of Tasmania pier. But 10 years ago when we moved from WA to Tassie, we turned off just before Melbourne. Have things changed?

This is my plan:

Head on to the Western Freeway out of Bacchus Marsh. Keep heading down the Western Freeway on to the West Gate Freeway.

Just after driving over the Yarra river, I turn left off of the Freeway on to Todd Rd, via Cook St.

Head down through The Boulevard, turn right on to Beach St and virtually end up on the pier.

This is what we did 10 years ago. Is it still this simple?

I have studied Google Maps (hoping that they are updated) and seems that this option is still valid.

I will be driving from Kalgoorlie so any info on diesel prices across the bottom half of the country would also be greatly appreciated. I am planning to tank up (main and reserve tanks) in Kal, and see how we go. Will also have a couple of jerries in the back. I will be trying to avoid places like the Nullarbor Roadhouse due to fuel prices!

Thanks for any help.

Tim.