Though technically illegal it is pretty accepted to put in at Bakers Bridge. Your 1st legal downstream access is at Trimble lane, river right, downstream of the bridge. It is a mellow, pretty float, should take you about an hour and a half at current flows in your IK. Trimble lane to 32nd is flat water, about 12 miles long, no legal access anywhere in between. Paddling a fast Downriver boat it takes me a little under 2 hours, in an IK plan on 4 hours. It's a pretty paddle through the valley.