Making numerous attempts at communications down there isn't uncommon so squacking 7600 never occured to me because usually the radar wasn't available either. I routinely found that places as close as Kingston seemed to make it a game to see how many times you would call them without them answering. I finally would just make two calls then one in the blind giving my position and ETA. This always got a response because it was treating them like a 3rd world country.