RedactedNarrative: Vessel 1 was approaching last turn just before Lulu Lake.  Vessel 2 was leaving Lulu Lake to enter the channel.  Vessel 2 had a paddle board across the stern and was sticking out past the port side.  Vessel 2 went around the first turn to it's right and Vessel 1 was coming from the opposite direction.  The paddle board on Vessel 2 hit the wake board and rack that goes over the wind shield area of Vessel 1.  The port pontoon of Vessel 2 also made contact with the starboard side, below the water line of Vessel 1 towards the stern.
NameOfBodyOfWater: Mukwonago River - Lulu Lake Ch
NearestCityTown: Troy