Some of the pictures were pretty tricky, I think identifying one that you had glassed in the field would be easier. The shoulder hump is pretty tell tale and some of the pictures did not have a shoulder shot.
This is all theortical for me though never hunted in a region that has both species.
It's all theoretical for me too - I've never positively seen a grizzly. I might have seen one once when I lived in Banff, but I'm not sure. There was some decent Black Bear hunting around home, but I was never successful, and I refused to "get in line" at the dump for a shot at a garbage bear.
Don't assume that when fall comes, or hunting season, that the big bucks, and big bulls leave. Whitetail deer bucks especially, simply hide. And they hide very well. Mule deer bucks may leave a little. Bull elk may leave, but don't assume they do. Don't assume any of them do. I mean - where would they leave to? (Just another place where, for the most part, they would be hunted.) These big animals have the ability to hide in very small, very obscure places. So, embrace the fact (...