I was across the river and saw him too. Called RAP and a short time later saw F&W checking out his truck and trailer (he didn't move it to the parking area but rather left it parked at the top of the staging area and then headed downstream in the jet). F&W called me back and said that they had also forwarded details to City Police and Bylaw. Didn't look to me like he was doing any study-type work. Definitely not CFD.