I am doing the section from the end of Hwy 546 (Sheep River Rd) to the Tombstone Backcountry Campground at the end of August. Doing it as an out and back on a FatBike. Is this section a slow slog due to the 2013 flooding?
It was really slow for me. There was at least a couple large sections lacking any trail and lots of rubble. Having a fat bike would probably allow you to bike in a few sections (like shallow creeks) that I was unable to. You can see pictures here: http://keekandcolin.com/2014/08/16/sheep-valley-bikepacking-trip/