Why don't people with boats just use the access off of Defuniak St., that's what I would do if I had a boat down there. That way they would avoid Lydia all together. Even if there are some larger vehicles that will go down Lydia, you can access it straight on if you stay on Hotz and follow it all the way around. It seems like this is what happens anyway.
It does, most people forget that you have to have a permitted vehicle and trailer to put a boat in and the people who are doing so are very experienced and skilled at what they do.