I'm going to have to rely on some local knowledge here.....
The Newie Boys (and girls) are coming so it can't be south of Wollongong (it'll be a long enough day as it is).
ozgdgalants suggested Woronora Dam, it's south of Sydney, but north of Wollongong.
I suppose the aim of the game is to get the Wollongong members to come out to play......
We have to get more than 16 cars this time.....
Look at the pics from the Sydney Cruise from the 6th. Members are getting out and putting in the effort. It's worth it. Now we've got ffiona (ffire) on board some awesome pics to remember the day by too. Bring 'em out of the sheds, finish 'em off, whatever. Let's show 'em what we've got.
So suggestions is what I'm after... I need help. If you don't like Woronora Dam, come up with a better one. I'll be listening....
Dave.
...just need the 2.6 engineered..? 
Kiama on the weekend is packed! Totally no parking and if the markets are on you have no hope. There is a new sky look out and a great road to drive down through from the Southern High lands, past jamberoo to Albion Park, with beautiful views, and you can travel along the coastal road through Wollongong up through over the new bridge and through the national Park ( tell the ranger your travelling through and you wont be charged) If we decide to stop it is a fee and there is some gorgeous spots to stop too. To start with you would have to travel down as far as the Southern Highlands, down the Freeway, I can google the maps. Your brakes would have to be in the best condition for the hill decent, single lane road but hell of ride. Stop at Wollongong Light house for some more shots. 