Cupie, the only new bit with a bridge that I can think of is the on the south coast of sydney down north of Woolongong, there is a bridge section along the edge of the surf/beach where some of the old road way colapsed some time back. We have been along it & its very good, parking at one end so you can walk it as well.
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Be your self; there's no body better qualified ! "I came into this world with nothing , I still have most of it"
We did that drive about 2 years ago, without the van, after picking up the Brochure at Wisemans Ferry.
Windsor-Wisemans Ferry-Central Mangrove (route #36)-is also a good scenic drive (again we were without the van) then eventually back to town to our Caravan Park via the freeway.
Great coastal beaches north of Wollongong, Camping C/Ps grounds at Coledale, Bulli, Corrimal. Do not forget to continue south to Kiama, a very scenic spot.
Once again .. Thanks all ... Good input to my rough plan. Will stick to the coast as much as possible but will probably go round the Sydney CBD via Windsor.