follow the rules they give you when you arrive and you shouldnt have a problem. no food in the tents, use the bear boxes, no trash left around etc.
in all the years Ive been camping Ive seen one, ever. I saw their tracks and could hear them off and on, but never eye to eye. and even it was miles from camp and ran when it spotted us.
worry more about running out of something you need (tp, water etc), as its far more likely.
