was that the extremely long stretch of dirt road in northern BC? if so, no. most of us actually drove that part in order to keep on schedule. however, a handful of people did ride it. about 6 or 7. it was a 200 mile day for them. they were running a mixed assortment of cheap ($13) Panaracers, stock Bontragers, and i believe one or 2 Specialized Armadillos.
At that point, my year's group was split into 2 routes still, the Rocky, and Sierra. the 2 routes met up in White Horse. we, the Sierra route, drove over that stretch at long after sundown, going from Prince George to White Horse.
it's funny you mention muddy. my route had experienced 1 day of rainfall out of about 50 between Texas and White Horse. the other route, the Rocky route, had about 14 days of sun, max. the day the riders did that 200mi ride was a wet day for them.
there was a stretch of road in YT that i seem to recall being in worse shape than the Cassiar. gorgeous land up there.