I would put the stories in the biography box. I might use a heading like
== Stories/Reminisces ==
and then post the stories. Many times there aren't online sources or a book source for the stories, they are just something you heard from the family. Source that with your name [[your WikiTree id| Anna Harris]], and this is a story told to me or this is personal knowledge -- something like that. Additionally, you should put You as a source under == Sources ==
I use * Personal family tree information. And my name. This is not a great source -- but it will let anyone looking at the profile know where the story came from.