Chelan Fire and Rescue responded to a 5th wheel camper trailer fire this morning (05/09/2018) around 0527 hour at 91 Apple Acres Road. Command 7, Engine 71 and Tender 71 responded to the incident. Engine 71 arrived on scene within 11 minutes 7 seconds of the 911 call and reported a fully involved 5th wheel camper trailer mostly burn to the ground with exposure to electrical service transformer located next to the trailer on the ground. Engine 71’s crew contained the fire to the trailer and used defensive fire tactics to extinguish the fire. Tender 71 was called in to provide water support. There was no indication of any occupants in or at the trailer at the time of the fire. Fire is under investigation by the Chelan County Fire Marshal Office.