Yes! There are a whole series of posts with photos and maps. Click the red "Tumangan, we are coming!!!" link at the bottom of the first post to jump to the next one, etc.
To save anyone else the hassle, this is where he finally crosses into NK:
https://vienna-pyongyang.blogspot.com/2008/09/tumangan-north...
Hope it is backed up well (guess on the archive sites).