Rob, I'm no expert, but I have been to Colorado (unit 521) numerous times. I wonder if you will really need a spotting scope. I did very well with 10x binoculars, which I used constantly, and didn't feel slighted at all. Socks are important.
For me. . I got it down to wearing a light silk or similar sock beneath a heavier wool sock. Two pair of each will do most times if you wash them as you mentioned, or at least let them air dry.
Same with clothing. The air in the mountains is incredibly dry (you need to hydrate) and things dry in a short time. Also, the sun is very harsh up there, so it will be hot during the day (cooler on north slopes in the big timber, where the elk will be). You will learn to hike, but not stop till you find a little shade, any shade, even a bush. It is a better habit anyway cause you don't stand out as much to be seen.
I would consider bringing a few more arrows and keeping them in your truck (if you drive out). I generally lose or break three or four arrows just stumping (rocks everywhere), but I stump shoot a lot out there.
I also use a stuff sack or a T shirt and stuff some of my spare clothing into it for a pillow.
Oh, and I sleep better with a .45 next to me, but I don't tend to carry it while hunting.
Good luck and take pix for your story here on Trad Gang
ChuckC