Hi Steve,
Which part of Sydney do you want to fish?
I live in Kingsford so most of the time I do landbased fishing in Eastern suburb or South Sydney.
A lot of flatties can be caught in Botany Bay, Yarra Bay, while for bream you can catch easily in South Coogee, north of Maroubra beach and Laperouse.
I have never caught any Yewies.
If you need someone to go with just let me know.
Cheers,
Andy