Yeah, I don't know about just walking onto someone's boat without an invitation, that might piss some people off.
But definitely walk around and chat up people and I am sure you will get an invite. The nice thing about the boats is that it's really the only place you can drink on the island other than the bars or your own hotel room. No walking around and drinking at PIB, although I may have seen it happen before...
Mills, if you guys and Bryan and whom ever else want to stop by just let me know as the weekends get closer so I can let you know which boat we decide to take and what dock we are planning on going. I think as of now we only have 3 boats going, so Bryan let me know if you want us to try and save you the 4th spot....that is if you will be getting there later then us as we won't be there until about noon on Saturday.