G'Day,
The "cruising master" John Barter ("La Attitude") at RMYC Port Hacking is compiling a guide to cruising which has a lot of information on cruising Port Hacking as well as general info. It has a small dated section on Lake Macquarie as well.
The link is,
http://www.rmyc-porthacking.com.au/hell ... 0Guide.pdf
This is about a 7MB file with lots of photos so for dial up it will be very slow loading. There is some good info there.
Hope it helps.
Greg.