Wyoming – The National Park Service is writing a new, long-term plan for Yellowstone National Park to determine what types of motorized access to allow in winter. Yellowstone is currently operating under a temporary winter use plan, which allows 318 snowmobiles into the park each day. That temporary plan expires at the end of next winter. What's needed is a long-term winter use plan to replace the temporary one. But the courts have rejected three previous attempts at a long-term plan. Now the Park Service is trying to draft a plan that will survive the courts. Wyoming Public Radio's Rebecca Huntington has more.