We've all been there with having that first hunt in grizz infested country, especially us guys from east of the Mississippi. There's a lot of right and wrong things to do, and before you experience it one tends to plan for the worst case scenario, which is a good thing actually. But even in places where you are constantly seeing fresh sign, sightings aren't really all that common, especially when there are a few hunters scattered around.
Negative encounters are even less common, but the consequences are often horrendous. If you will just learn the do's and don'ts and remain extra diligent during situations when there's a high percentage chance of an encounter you will be fine. I believe that situational awareness is important, as victims of attacks consistently claim that by the time they knew a bear was coming, everything happened so quickly that they had no time to react.