Well, you might consider using a hidden partition on your device or using specialized software that offers stealth mode for storing and accessing your story. Also, changing the file extension or compressing it with a password can add an extra layer of protection.
One way to hide tags on a story is by manipulating the HTML code. Find the section where the tags are placed and add attributes or classes that control their visibility. But this requires some technical knowledge.
To hide a story, you might consider disguising it as something else. For example, presenting it as a fictional tale within a larger collection of unrelated stories. Or perhaps changing key details to make it less recognizable. Another option is to only reveal parts of it at different times to different people, so no one has the complete picture.