I really like the scarf and the way the green knits up. I think it would be easier to decide if you had a swatch knitted up of the Chaco Canyon.
I did start the CPH Viking version a couple of days ago. I happened to get 12 skeins of Rowan summer tweed on half price sale, went straight onto ravelry to see what people made with it. One person had made a CPH using that yarn, used up 12 skeins knitting my size. That just told me that it was destiny calling, I did get my DH go back to the shop and get me another bag of ten skeins just in case. Did not want to be half a skein out. Can always use the extra yarn for something else.
Will go take a picture of my progress so far.