Yellowstone National Park is seeking people to participate in five working groups to help forge winter use management policies for the park. Each of the working groups is to focus on specific winter use topics including soundscape and air quality, wildlife, the noncommercially-guided snowmobile access program, winter operations and technology, and overall visitor experience. Park Spokesman Al Nash says the groups will participate in a conference call with the park next week regarding the project. He says the conference call provides a first opportunity for those who are interested to learn more about what is being proposed and how they may participate in a working group. “We’re giving people an opportunity to select what area they would like to focus on,” says Nash, “and then give them some guidelines on how we would like work to begin.” Then, over the next six months, each of the groups will convene at least three times by phone or in person, so that they can compile written comments to submit to the national park service. Anyone wanting to participate in a group should call 344-2265 to express interest.