The rapids really do not start till after Radway Hill Road Bridge which is off of Rt 30 near a flea market or fairgrounds. There is a put in on the far side of the bridge. Were I to do this run again this is where I would start from, as the river is quick water to class one above. From the bridge it is 11 miles to the ball fields.
The best rapid is immediately after the confluence of the Rock River and the West River - a bouncy wave train boasting 5 to six foot waves for 75 yards. There was nothing worse than class 2 + rapids on this trip and it reminded me a little of the Housatonic River covered bridge section.
We used LL coupe sit-on-tops which were great for navigating the flats which can be long. The weather was beautiful and we only saw one other group of kayakers making it a great place to go to avoid the chaos of the West Fest.