Residents of the lower elevations of Nevada County might question the need of any local fire department for a snowmobile and toboggan. But for the North San Juan Fire Protection District — whose volunteer firefighters might have to respond to a medical aid call at 5,000 feet — a snow-rescue setup had been at the top of their wish list for a while. That wish finally has come true, thanks to the hard work of the North San Juan Fire Auxiliary. The group, whose “only mission” is to raise funds for the department, spent nine months pulling together the bulk …