Ralph DuPae may have or know where to find old photos of Little Kanawha boats among the 54,000 river photos at the Murphy Library/La Crosse. He often posts photos on ebay (his ebay handle is his email address). I'm sure he won't mind an email inquiry for photos: rdrboats@msn.com
We recently acquired the old LORETTA HOWARD steam towboat for a landing barge - Low and behold Ralph had 14 old photos of her, including some when she was named the DOROTHY McBRIDE for just a few months in 1933!!
You may also want to check with Dan Owen and his Boat Photo Museum: http://boatphotos.home.mindspring.com/welcome.html