RedactedNarrative: Boat operator and occupants left Hornsby Hollow campground around 18:30 to teach his son how to ski. At approximately 18:40, operator got to close to an island and struck a tree on the island. operator immediately called 911, and other boaters came to their aid, by helping with an injured female, and towing their boat back to shore. EMS and TWRA showed up just a few minutes after they arrived back on shore.