Panda,
If you are at Middle Creek reserve then there are a few things that will help.
Looking from the beach/launch area upwind in a nor-easter.
The right hand side atm is quite shallow. There is a white buoy just upwind of Chat Pt. Very shallow all the way up to that marker approx. 15 meters off the shore. Once above the marker its waist deep and that's where the majority of guys do their runs from.
The left hand side is deep all the way up to the sand bar at the entrance to Deep Creek, cant miss it.
We basically sail from the right side across towards Wakehurst Parkway side and if you get a decent gust you can get a short bearaway under the sandbar. back & forth is the norm. Not long runs but usually good fun. Very gusty and swirly but if you get out at the right time its fun.
Can be very light on the ocean but the wind funnels in and its quite sailable early.
Some very weird & wonderful characters in attendance as with most spots

Friendly locals, give me a ping if your heading down on a good forecast,
As for underwater obstacles, its pretty good at the moment apart from the odd mullet you might run over. Only bad after major rain or storms.
Cheers,
Larko.