In recent years (5-10 years or so), I've taken up this habit when flying cross country away from my home field, Mountain Valley Airport, Tehachapi, CA. First I try to arrange a "back up crew" before take off. But, since I have a lot of friends on the airport I do this.

Fill out a 3x5 card with my name, aircraft N number, call sign, emergency contacts, backup crew and mobile numbers, flight intentions. For the last 10-15 years, I also carry a Satellite tracker (latest one is a Garmin InReach) with the shared web link that is also on the 3x5 card.

So if I don't come back and the inevitable "... what happened to "WX"..." comes up, people on the airport will find my car keys in the console (trailer hooked up) with a 3x6 card prominently displayed.

Walt Rogers WX