I flew a helicopter in Alaska with the fish and game darting interior grizzly north of the Alaska range. I hunted them on the tanana flats and if there is any advise that should be given is that they are very fast and very quiet, I had them as close as 20 yards without knowing they were there until I spotted them. Smell is another thing. They know you are there long before you see them and IF there is a food source they have near (rotting smeat) stay away from it, sit down and wait.