RedactedNarrative: Trailered Vessel was loaded onto the trailer next to the west dock at Platte Creek Recreation Area boat ramp.  V1 approached from the east.  V1 became positioned sideways between the two docks.  V1 attempted to turn north and struck the trailered vessel.  The port side stern of V1 impacted the port side stern of the trailered vessel striking the kicker motor and main motor of the trailered vessel.