Very nice plan! I really like the idea of putting a URL into your PLB registration and keeping it updated. Everyone with a PLB should do this.

Forgive my radio geekery: How did you come to have an MT1000? Are you licensed to use those frequencies (NB in an emergency it's legal to transmit on frequencies that you don't have a license for, if that's the best way to communicate)?

I'd be putting my amateur radio callsign and gear on the list. Presumably the local RACES would be willing and able to provide a ham with his/her radio to try to communicate with me on whatever frequency I'd be monitoring.