I have gone through the "narrows" a dozen times or so and the easiest times to do it for me have been at the lake's low slack tide which is about 3 or 4 hours after the ocean's low tide. When you are going out the water gets shallow quickly on the left because of the sandy beach so you want to err a tad to the rocky right hand side. Beware the often hidden rocks lurking by the bluffs, though. I have seen a couple of sketchy incidents. When I decide to cross out to the ocean I just try to wait for what seems to be a quiet time in the waves and commit to crossing. Once you go, just go, and hit the surf squarely. You better have a good reliable engine that will get you to speed in a hurry. It is a spirited piece of water that can get dangerous. I am always relieved when I get to the other side. I personally have never had a problem getting back in to the lake on the way home...am I alone in this?
What I would be as concerned about is running out the last mile or two of the lake. It gets really shallow and nasty at spots. Follow someone if you can. If not, pay close attention to branches and stuff sticking up out of the water, avoid them, and keep your eyes on your sounder.
Have fun! They grow lunkers out there and it's nice to catch slabs without flashers.