One comment on the second batch of files, re: north end of MB 8:
When I went up there in 2015, I saw an End MB 8 marker a few hundred feet north of the northern access to Hecla village, well short of road's end where you now have the route ending. A blurry GMSV image confirms my sighting. The End sign is around where the speed limit, and road quality, drop below rural PTH norms. So truncate MB 8 to Hec_N?
BTW, I saw no name on either Hecla access road, so I can't improve on Hec_N and Hec_S.