So, after 5 or so days of anticipation, I went and tried the Muir Main to Butler Main route. It isn’t a street bike ride, but if you can handle somewhat washed out steep sections, you’re good.
Had a reasonable ride on Sunday, gpx trace below (in blue)… basically through Blueberry flats and up Muir Main. The red trace is from don’s adventure travel (Hidden alligator lake ride #3), and was part of the logic behind this particular route. (Green traces are other days, some of them later.)