What you need to know is that you are operating in the Glacier National Park area and every time you head to the backcountry, you need a permit from the park authorities. The reason for that is not to limit the number of people in the backcountry, but to keep them safe, and not safe from backcountry hazards, but from the army. As Rogers Pass is located on the main Transcanadian Highway and railway, there are 134 zones that are regularly under heavy artillery fire that are supposed to cause controlled avalanches and keep the road safe.