What do you do if a bear charges you!?

Hi, So my family and I are going to our vacation home in Wisconsin like we always do every summer. Lately, my grandparents have seen a few bears around not at the house but around the roads and in the bushes. My mom and I were discussing what we would do if a bear comes at us? Should we stand our ground? Even though a bear can out run us, should we run? Should we jump of the pier and swim? Do we crouch in a ball? I want to know what you should do if it charges you or what you should do if its just coming out of the woods and is just looking at you. Do you back away slowly so you don't look like a threat? The back yard is probably like a little more than half a foot ball field long ways and woods surround it and we have a pier and 2 boats. What should we do? Any facts or articles on bears or tips on how to get away from one would be helpful! We're leaving tomorrow so I need this question to be answered kinda quick! Thanks in advance!