I've always lived within ten miles of here, except when I was away for college and university. The latter was in a large city — that was scary! When I was a youngster, we used to go harvesting to a nearby wilderness area which abounded in wild blueberries. I must have been told this at a very early age because it seems as though I've always known that if I met a bear while we were up there, just quietly walk away. It's their territory, not ours, so treat them and the territory with respect. It's black bears that are native to this area. They don't generally attack unless they're provoked, hence the "quietly walk away" advice.
As for rattlesnakes, never step over an obstruction from the shady side to the sunny side without looking at the area where you'll be putting your feet. Because they're cold-blooded, snakes always choose the sunny side for basking. Even if a snake isn't poisonous, you really don't want to step on it.
It's all just the rural equivalent to street-smarts.