As stated, there are no grizzly in Colorado, so I don't know who is feeding you that BS. Also as stated, black bears should not be a problem in the field. Only thing you need to worry about is camp if bears are not finding enough food in the wild. I hunt almost every year where the bears are pretty thick and have never had an encounter that was threatening. Most people do not even see a bear when hunting in Colorado.

My wife and I encountered a black bear on a hike last summer. He was feeding about 150 yards in front of us but never saw us. We took pictures of him as he feed. I told my wife, watch this because he was feeding in the direction that eventually took him directly downwind of us. When he hit that scent stream, he threw his head up, gave a quick look in our direction, then swapped ends and hightailed it out of there.

Very rare to have problems with Colorado bears in the wild. Most encounters are in campgrounds when food is scarce.

NEVER store any food in your tent.