Thanks for the links to the photos Ebbie, the ones by Steve Winker "Out on the glacier" are really good as well.
When I was in Alaska ten years ago they had shut the more remote campgrounds in Denali Park because wolves were teeming up and raiding tents and it was thought that they might attack lone walkers.
I went to Talkeetna for a few days and camped on a site just outside town. They said there was a bear that was causing problems but I would be ok if I put my tent near the reception area. I went into town for a beer and some food and when I came back the tent had been flattened and a pole broken. Another camper said the bear had shaken it about and he had driven it off by throwing stones at it. They let me sleep in a disused log cabin which was bear proof but not mosquito proof so I soon mended the pole and used the tent inner as a mosi net.
Sadley the bear raided a porch on the edge of town and the occupier came out with a hand gun to fire over its head but hit it by mistake. Wounded, it had to be hunted and shot by the State Troopers. I was surprised that there appeared to be no rules about trash cans on the campground as these were just oil drums with the tops cut off. The bear just came on site, rolled them over, raided them, and thus became habituated.
We saw black bears when we we were sea kayaking in Kenai and when we went into the scrub for a call of nature we carried pepper spray and sang the bear song loudly.
I hiked the Chilkoot Trail solo and was bit nervous the first night when I was camping by myself with the Talkeetna incident fresh in my mind. A large whisky reduced the bearanoia slightly but I got a shock in the morning when a pine cone landed on the tent!