Slabtown to Ross may be a good two day with lots of stops. its about 15 miles and has a good flow right now. (was muddy monday but should be good now)
try this guide on e book:
Flyfisher's Guide to Missouri & Arkansas
https://books.google.com/books/about/Flyfisher_s_Guide_to_Missouri_Arkansas.html?id=PHLkYzAg7JkC
Water Data at Piney, MO.
https://waterdata.usgs.gov/monitoring-location/06930000/#parameterCode=00060