Just after 02:00 Kuhl Hose & Emergycare were sent to Kuhl Rd @ Old Wattsburg Rd.  Initial calls reported a car into a tree with 4 patients.  On arrival an SUV into a tree with heavy damage was found @ Kuhl Rd & Schwab Dr just north of where the accident was reported to be located.  All 4 occupants of the SUV were out.  1 of the occupants was unresponsive and Life Star was requested to the scene.  697's crew treated and transported the serious patient to Hamot Shock Trauma.  687 obtained refusals from 3 of the occupants who all had minor injuries.  683 & 689 assisted with patient care and secured the vehicle while 682 set up a landing zone for Life Star.  The Patient was transported to Hamot via ambulance.  Life Star was unable to make it to the scene due to fog/weather conditions.  PSP was on the scene and is investigating the accident.