Give me your ideas!!!?

ok, so this coming Sept, my fiance and i are going to Olympic National park and i need ya'll to throw out some ideas as to what i'll need to be taking??

I'll be going on an airplane so i can't take huge things.Give me your ideas!!!?
You MAY or MAY NOT need rain gear in the park in September. But better bring--at the least--light plastic rain jackets and pants that fit over whatever else you'll be wearing. (I've brought rain gear into the park every time I've gone, but have lucked out and never needed it).



It's not likely to be severely cold--September is typically a mild month in western Washington--so you won't need bulky or heavy winter jackets. But you will likely need sweaters or jackets of some type, especially at night.



Your footwear should be decent, waterproof hiking boots. Bring something to carry water in, too. There are lots of streams in the park, but the water in them shouldn't be drank without being disinfected.
The park, first and foremost, is RAINY. Take something warm that will shed water pretty well; I'd suggest something like a Columbia jacket with a polartec liner. Good shoes and appropriate socks for hiking are important as well, if you plan to do that. Most of what you need to take, though, depends on what you will be doing. Without knowing more about that, it's hard to make any kind of real recommendation.Give me your ideas!!!?
hair straightener

underwears

jakets

pants

toothbrush

maybe me ? xD hah