Check photos of the route on one my pages at
http://yukonsights.ca/CampbellHwy.htmlConditions vary year to year depending on construction phases. Some trips it takes four hours to travel 100 miles, and the mud collection on your rig will be substantial.
Do not rely on fuel being available in either Faro or Ross River. In Ross River, the one gas station can be out of fuel until its next delivery which can be 3 or more days. At Faro, the fuel is available at credit card self-serve fuel facility (no staff or other services). Sometimes the computer goes down and you have to wait until a techie arrives to reset the system. We waited three days but were there for an event so no big issue.
So have enough fuel to take care of yourself on the 360 mile route.
The only campground with services is the community-operated site in Faro.
This is the highway south of Ross River

And this was one of the construction zones about 40 miles north of Watson Lake in 2015
2015-09-16_Liard-SimpsonLk