Uhf. I bring a group of educators to Badlands National Park every year. We have a rule of thumb about the bison. Extend your arm, stick out your thumb and if you can cover the bison you are far enough away. If any part of it sticks out, back up.
Bison are habituated to people so they wander through the campground which means there are opportunities to get too close. What drives me crazy are the people who feel they have a special “kinship” or connection to bison so they don’t need to follow safety measures.
Oh yes, you do.