Shane, send a pm to the taylor boys, they will give u a heads up. I know at that time of year, the smaller black marlin move on from bowling green and head down that way as they migrate their way down the coast. It is big tide country down their, any points or rocks that recive alot of current should hold GT's. They also get massive sailfish down their to 50-60kg range. The only spot that i know of for billfishing is the back of hayman Is. U sholud also get plenty of spanish mackerell to.
cheers
Ashley