Went up there bright (dark) and early to see what I could capture. It is about a 20 minute drive up the freeway from my house. Surprised I didn't think of this spot earlier.
Picturesque little spot
Some information on this location from wikipedia
It is is a semi–mature tide dominated drowned valley estuary that travels for about 120 klms.
Australian novelist Kate Grenville wrote an award winning historical fiction novel The Secret River set on the Hawkesbury and it has featured in a few famous TV series.
According to the Hawkesbury Nepean Catchment Management Authority, the Hawkesbury River estuary supports the second largest commercial coastal fishery of estuary prawns, oysters (prior to the outbreak of QX disease ) and fish in NSW with a wholesale value of $6.3 million annually.