I would worry a lot more about snakes and spiders than black bears...
Black bears are generally scared of humans and high tail it when ever there is an encounter. I have been around a lot of blacks up in Northern Wisconsin, and the only one that ever gave me a problem was one I was tracking that my son shot and I accidently cornered him. But I am not sure if he would of really hurt me or he was just trying to get past me quick... Either way it cost him his life fairly quickly
I have woken up with them trying to get into my truck at my campsite and chased them away, and have chased them with hounds, and hunted them up close with bow and arrow.... Nothing to fear.
The only way you get into trouble is if you loose your respect for them.
We have about one bear attack every few years in Wisc. and its always something the person did that caused the attack. Last year a guy had a bear with cubs come under his deer stand while bowhunting. He tried yelling at the bear to scare it off which is a commen mistake. The cubs natural defense when something startles it is to run up the nearest tree while momma fends off the attacker... The nearest tree happened to be the one the hunter was in. The cub moved fast and got above the hunter and then saw him and wouldn't come down. Momma came up and the guy tried kicking her. She bit his foot breaking a few bones, then realized it was a human and jumped down and ran off followed by the cub...
Another commen problen in Wisconsin is people going to dumps or in there back yards feeding bears to the point that they loose fear of people.
Especially when they hand feed them... Believe it or not a lot of people do that.
Here is a few pic's of bears I have shot. My 1st bear was shot with a rifle at 10 yards... I vowed to use a bow and arrows from then on...
Here is my 1st bear (30-06) Two shots thru the heart dropped him. 1st shot recieved no reaction.
Here is my second bear, a 500 pounder. The arrow passed right thru and stuck into the ground. the bear got about 20 yards after the shot.
3rd bear. 400ish pounds One arrow thru the heart. got about 20 yards.
All the bear above were taken in Wisconsin. I got this one a few months ago in Minnasotas north woods. I am due to draw another tag in Wisconsin any year now. So far the 3 bears above represent the 3 tags I have drawn in over 20 years of applieing....