I honestly think a clave for shore could be a waste of time. Matt experience there last year I would call the exception. The hook is pretty good but they may not swim past. You could spend a few day for nothing. I would really focus on getting a boat.
I don't know if I can make a trip down there. I have this September trip to CO. It is a great trip though and I wish I could go with you. Also Camping on the hook is illegal. You can seek there at night but if there where a bunch of you I am sure the rangers would spot you.