thanks chaps ..thats fantastic local knowledge.
I might just have two plans ready to on the ground at Yscb canberra, and if the weather is great , go CTA all the way, but if theres a lot of cloud 4000 feet or a bit lower then go sneaky low.
I will check what the quiet time is at Essendon on Fridays...I'm sure that will help getting a straightforward clearance closer to destination.