Many folks are hard at work updating new river maps for recreation near and upon The Shiawassee River.
Look for them at upcoming events like Fenton Expo, Quiet Water Symposium in Lansing, and other venues.
With a little prior planning, a canoe/kayak trip of 20 miles in one day is quite possible. Explore new areas, see more wildlife, and experience a different section of the river. Some parts are skinny, some wide, others flow slow, while certain sections are quick. Something for everyone.
Get some some friends together, stage some vehicles downriver , then everyone shuttles back to the launch site. Take lots of pics throughout the day, share with people , let them know about your adventure on the Shiawassee.