I actually thought about drainage quite a bit. I ended up raising the deck 3" to get it above the water line a bit more. You can see in the pics that one side of the cap is already cut and the other side isn't. I also plan on criss crossing the drains so they bail out of the opposite side, this way when we are all in a corner landing a fish we aren't in ankle deep water. The deck drains I bought also have a ping pong ball in them to help stop water from coming in.
We took little man to the beach for the first time this morning and I was able to tab some bulkheads in after we got home.
