We first went to Yellowstone about the time you were born. In those days they were not as careful about keeping the bears and tourists separated. Just about every time there was slow down on the road, there would be people feeding bears from their cars. So I saw bears coming right up to our car window. They told you not to feed the bears, but some folks did it anyway. I presume eventually some people got stupid enough to get out of the car to feed the bears, which is why they had to move the bears away into the further reaches of the park. I have a photo taken in Sequoia/Kings Canyon of a little girl next to her mother feeding deer right in front of a 'Don't Feed the Animals' sign. On the other hand there was a state park in South Dakota (maybe Custer State Park) where they had burros running wild and you were encouraged to feed them from your car. I remember a time when I went to Badlands NP in South Dakota by myself and saw a family walking up to a bison. I would have said something to stop them, but they were already so close I was afraid that if I spoke loud enough they'd hear me that would spook the bison enough to get someone hurt. They were lucky and the bison just moved away. Too many people recently think park bison are tame and get gored.