D.F.
K.,
What a great experience you have ahead of you! We lived in Iwakuni from 2002-2005. As for furniture, unless the pieces are ridiculously bulky, bring them. I wouldn't plan on bringing furniture for a living room and a family room though, the housing isn't set up for that kind of space. DO bring your washer and dryer! When you pack out, you will get to prepare two shipments-regular household goods and then your priority stuff that will get there faster. Think about what you and the kids need an put that in the priority shipment. There will still be a delay for it though, FYI. My husband and I moved over there before we had kids, but we brought everything that we had (which really wasn't much) and it worked out fine. Lots of people bring too much stuff, and really that works out fine too, just more furniture in a small house. Of course bring your Christmas decorations!!! And the stuff for the kids, even if you live in a mid rise (without a yard) there are parks and sidewalks and you will want to be outside with them. You are going to have a great time. And don't forget to explore and get off base!! It will make your time there so much more enjoyable, there is so much to see and do!
As for the flight, I suggest snacks and drinks, crayons if your three year old is into it, perhaps a special "new" toy, and I hate to say it, a DVD player. I know all moms have all sorts of views on that, and that's great. But it is a REALLY long flight, and sometimes giving in a little is OK. We also travel with an iPod with kiddie music. Target has some on the go activity sets that seem fun, although I haven't purchased one. Good luck to you and your family!