What others have said... get a map and or stay close to the marked channels. Once you have reached the open bay, you can either work left or right and get into some out of the wind spots... but any kind of west wind will make a mess of the river mouth.
I found it a tough place to catch fish... but I was there in the heat of the summer a number of years ago, you may have better luck.
Also, in the week we were there, I lost at least three days of fishing due to the wind.
HH