Thanks for helping me put things into perspective... lots of good info in the responses. I think i will leave it the way it is. I should clarify about the tides though. It's not a typical high and low tide (Lunar.) It's the wind (especially from the NE) that pushes the water in and out so the average range is between 1-3 feet usually no more than 2' though. If a storm comes through then i'll move it to the mooring.
Here are a couple pictures... although not the best since i'm working with what i've got here at the moment.
And... the drawing i'm faxing to the people doing the work: