I had a lady Ranger at Purple Lake in the John Muir Wilderness ask me why I had not hung or tied up my Ursack TKO when they were stil approved. I told her that you could no longer tie it to a tree as it had the potential to damage resources and it wasn't designed to be hung in a tree. She asked for my name and email addy. Never heard anything from her. She had a small crew with her and they were rearranging fire pits to the three rock design, a smaller size.