RedactedNarrative: Vessel #1 was pulling tubers.  Vessel #2 hit #1 on its rear port side.  #1 had 3 occupants ejected from the boat but were uninjured.  #2 occupants went back to shore (while taking on water).  #2 occupants refused all medical treatment to their injures.  It was undetermined exactly why the two vessels collided other than that they saw each other too late to avoid each other.  It was reported that they possibly had broken bones, but did not report which bones could have been broken.