Two young grizzly bears is a view that is seldom. In Yellowstone there are said to be many, but the bears are shy, unless they are hungry. In former periods these animals were sort of domesticated. This was for instance the case in Yosemity, but nowadays the administration tries to keep the animals as wild as possible. So don’t leave food in your car because bears have a very good sense of smell, and you might find your car ruined the next day.