Unfortunately it is pretty easy to get on the docks down there. Just follow someone in. I do service work at the hyatt and have had people hold the gates open for me when I was walking by even though I was not going on the docks.
I hear ya and we talked about that being a possible way he got in, but being that the boat was taken sometime around 4:30am, it may have been a little more difficult than the more normal busier dock flow/traffic hours.
Still very curious as to how he really did enter...... was it as said above or another way..... or is it unknown?
The unknown fisherman