The problem with long hair is that even if you tie it up in a bun, it still will cause rain water to wick down your back. I am ready to cut it all off and dye it platinum for my trip this summer. When I was growing up, I used to have it short all the time as a swimmer... and it is way easier to camp with.
I go to REI for all of my camping equipment. I have been a member for a long time. Every time you buy something you will get cash back in dividends at the end of the year. That can add up to almost 200 bucks some years! They also have REI brand equipment, which is generally 60-80% of brand name stuff.