Masaki - you'll be shipped first class, of course! Let's see .. if the world cruisers get up to 275 lbs of luggage shipped apiece, then we should be fine. You go in one trunk, Amanda & Marika in the other. We can do 4 weeks on 50 lbs luggage total (she says bravely), leaving at least 50 lbs for Amanda and Marika. You'll look just fine in your shorts & flip-flops.
Start working on your Aussie accents! G'day!!
Cheers, Anne