What part of the river do you what to get on? I have had my bass boat in at Rockford and Rosco. It was a little hairy in Rosco in low water.
I backed my boat in at Rockford on Saturday morning. Did not take it off the trailer, just wanted to see if she ran after the long winter. The river was posted "no wake". Had to get all 4 truck tires wet if I was going to take it off the trailer.
As mentioned there is a launch in Roscoe in the park there just off Bridge street. Also a few miles upstream there is a launch in Rockton off Hononegah Road. Watch your water levels in this whole stretch. If it's way low you can / will have problems if you are not careful.