The put in is Doothea Weigand Riverfront Park in Naperville. It's a minor walk through some much to get to the actual river, but it works.
The take out is the Dam at Hammel Woods. You drive in via the route 59 access portion of the park, and drive through to the last loop, then can walk to the dam. The take out is maybe a 5 minute walk away from that.
This trip: water was at normal levels. It took me about 5 hours of paddling hard to get to the end. Good day.