So let's simplify things. I will definitely stay in nylon / Gore - Tex camp. Cotton will get wet and be just heavy and useless. Long pants to protect the foot, the same for you shirt - long sleeves. Although you can pack a shirt with short sleeves. Light rain gear. And maybe a sleeping bag rated to about 32 degrees. So, a list something like this:
* Layer Base: Probably my favorite thing as a regular, Patagonia Capilene T Silkweight One ($ 39) and bottoms ($ 45). REI's Lightweight Polartec PowerDry Crew ($ 25) is also good.
* Clothing: Pants shall be ex officio the Vent'R ($ 70) are tough and lightweight, and made for difficult trekking conditions. Columbia Sportswear's Silver Ridge II Pants ($ 72) to give you the option of convertible so you can turn them in brief.
* Clothing Rainwear: REI's Kimtah jacket ($ 229). This is a nice, light piece is made with fabric that event, which is really breathable stuff. Arc'Teryx Beta SL's ($ 250) is another good one. Made with Gore-Tex PacLite for light weight and good breathability.
* Boots: Asolo FSN Something like ($ 195), which have a Gore - Tex, leather and uppers cut nylon, and grippy outsoles for muddy trails. Lowa Khumbu Mid Boots TC of GTS ($ 245) offer similar benefits.
* Sleeping bag: Maybe Ultralamina Mountain hardwear 32 ($ 190), which has filled so that the synthetic will dry faster and keep you warm when you're wet. So there you go.
Have a good trip!