That looks like a good device. I use a qstarz logger (http://www.qstarz.com/news/news-20080515.htm) with a Brunton solar roll (http://www.brunton.com/product.php?id=256), but I still ran out of power a few times and would have liked the SD card storage.

I have CDT data for Wyoming only (and a few bits in New Mexico). It's an interesting task because the CDT is still commonly accepted as a choice in many place (by through hikers, at least) rather than a fact, so the route can be subjective. A good way to do alternates will be important in the long run.

Really an awesome contribution! I've been working on the CDT for quite a while, but I don't have complete data. I'd love to know a few details about how you collected yours.