Everytime I see one of these midwest mud-fest blowouts I'm glad the roads down here are a good mix of stone and well draining hardpack. I'm not strong enough to spend that much time in such conditions and still pedal down the road.
Once we did have a solid week of every-single-day rain before a 100k gravel event. The roads were soft and there was mud and sand and silt everywhere but it was still 100% ride-able on 40mm tires.