The drive from Carmacks to Faro can be scenic and interesting, and has enough traffic on it that it is maintained well enough. It would be worthy of a drive in and then taking the same route back out.
South of Ross River the conditions vary greatly year-to-year. There was one year the Visitor Centre in Faro was highly recommending not travelling further south. Same with the Watson Lake Visitor Centre - they recommended going through to Whitehorse rather than taking the Campbell Highway to Ross River and Faro.
In 2015 we thought we'd drive the whole route from Watson Lake north, but turned around at Simpson Lake and drove back to Watson Lake. The conditions were rough.