Wow! Chainsaws? I know that is available for smokejumpers/hotshots though trail crew? Maybe mistaken or some unique clause to Frank Church Wilderness? I worked trail crew in Bridger-Teton a couple seasons (back in the day) and it was horse packed crosscut only.I worked on a trail crew in the Gospel Hump Wilderness for a summer. Every year, my boss and several permanent fire employees float the Salmon River early in the season. During this time, they try to clear as much trail as possible using chainsaws. There is a clause that allows them to use chainsaws early in the season in the Frank Church Wilderness, but can't later when hikers are more common to preserve the wilderness experience. Without that a lot of the trails would fade away like they had in a lot of the areas I worked.