Referee reports I have written in tenure packet? I’m currently preparing a tenure packet. I have reviewed a few papers for journals in the last few years. I am wondering how I should include this activity.

Certainly I will be including evidence of this professional activity (e-mails with the editors acknowledging the receipt of the report, etc.), but I presume that it would not be standard practice to include the reports themselves. It already feels a little odd to quasi-publicly acknowledge that I was an anonymous referee for some papers that didn’t get published (Hmm, I wonder what my report was like), but this seems like the right way to go.
Absolutely not.  Referee reports are confidential, especially for papers that were rejected.  Including them in your tenure packet would violate that confidentiality.