Not sure if it was I who made the last comment you found. I rode it in 2014. The north/west slope was generally not that well maintained. In fact, I believe there is a sign that reads "not maintained for vehicles" or something like that. Note that the U.S.F.S. facility at the base of the climb is no longer a maintenance facility. That may have affected how often the pass is maintained. Based on my experience, I think you would be pushing it on 32c tires on that side unless you are travelling on the light side. There were some places that had fallen rocks/stones and a generally rough surface. I lost traction a couple of times and had to push for short distances. When I finally made it to the top, there was a relatively narrow section of tree trunk that had clearly been placed across the road intentionally. I think the message that was trying to be sent was "If you can't drive over this you shouldn't be riding that slope." I did actually get passed by one vehicle heading south/east. Old timer with a dog in the front seat. His vehicle had good ground clearance. He was quite patient and waited until I came to a curve where there was enough room for me to pull over so he could pass. There are some stretches where that is not possible. There is a sign about the lack of pullouts for the first 6 or whatever miles at the base.
The south/east slope was an entirely different story. Except for the initial part of the descent, the grade is mild to very mild. The surface was either hard pack dirt or small gravel. Easy riding. There are some recreational opportunities back there, so expect to encounter some vehicles. I rode it mid-June and encountered maybe 5 on that side.
With all that said, if you think you can make it it's worth the ride. Some of the views going up are terrific. Make sure you look back when you are on the section where you have to choose which tire track to ride in. And make sure you choose the left one whenever possible. If you are on the right and fall to your right it's a long, steep slide down.
I will post a link to some photos if I get a chance.
It would probably be a good idea to stop in the Sula Ranger Station to ask about current conditions because what things are like today could change tomorrow. It is located on U.S. 93 not that far beyond the Sula store/campground and just before the left turn for the pass. Note that I am pretty sure that office is closed on weekends.
