This is a link to AOPA Live news video from May of 2012. It features Walt Fricke’s Aircam (N612WF) being ferried from Florida to Minnesota via the Mississippi River.
The relevant part begins at 15:50 into the video.
http://www.aopa.org/aopalive/?watch=9meDkzNjoXGacfZ8s7vFvlNrETkUgy7J