Road was in great shape for the most part, some rockfall on the climb out of Lillooet, some deadfall across the plateau (take a saw). We had a squall cut across our route as we were on our way to the ferry, the road turned to greasy snot in a few places, made some exposures and pitches pretty dicey and scary, in particular the uphill approach (NB) to the ridge at ~72km, couple of level places across the plateau, and again (a significant amount) descending at ~77-80km. If you see ruts, expect super sticky mud. My tires packed up 1-2" of mud, was probably carrying 200lbs of mud weight after this. Descending to Big Bar Ferry after this point was fine, saw some dry hardpack ruts that showed that the roadbase would be sketchy/soft if it were wet. Ferry operator told us the spot where we were stopped had had 4 guys on ADV bikes get stuck and require an expensive extraction.
Stock Chev Colorado, Toyo Open Country A/T tires, 28psi

Good up to the 30km sign, doable in most anything.