RE:Christmas Island Fishing Trip
You are going at a great time of year. Seems to be less pressure from May thru August. Our winter months can bring out some real stuckup flyfishers to the Island. Guess they go trout fishing from May on. One thing to remember about May through August is that it's winter far to the South and that means big south swell moves northward. If you surf bring your board it's great, a surf and fish vacation. The Patagonia executives go at this time of year because they do both.
Good luck and be prepared to eat so much lobster it will come out your ears by the time you leave.
I've had friends that bring heavy surf rods for night entertainment and have caught Trevally close to 100 pounds while enjoying a beer or two.