That looks like a nice ride to Woodland Campground.
For a shorter option, with perhaps a bit more gravel, I am thinking about Huff Access County Park via K45 and E60. It looks like gravel from where E60 passes over I-29, about 3 miles to the park, about 22 miles R/T. Anyone familiar with that area?
Is there a good riding route from Muscatine up to the Quad Cities? I was thinking of car-shuttling a truck down to Muscatine on the Friday before RAGBRAI, then riding home. But I am not familiar with those roads.