Beginning Thursday, the National Park Service will call on the public to give its feedback on their latest ideas for winter use of Yellowstone Park. This is part of the Supplemental Impact Statement which will help inform the final winter management plan expected to be ready by December of this year. The most controversial part of the proposal deals with reduced snowmobile numbers. It would require that all snowmobiles be guided and that only between 110 and 330 will be allowed inside Yellowstone. Cody Chamber Director Scott Balyo says he would like to see substantially more allowed.