nice idea, but...
I'm sure I will get flamed for this, but here's my .02
I am a rider and a firefighter/emt/search/rescue responder with 20+ years experience (NOT in Calif.). Search and rescue is a serious undertaking and we are highly trained professionals. Organizing and executing a search and rescue is a major operation. Good communications are paramount. In the age of scanners etc., volunteers often show up at search and rescue operations eager to help. While lay bystanders do want to help, often when they try to do so they make matters worse. It may be as simple as obscuring the track of the lost party, or making noise that covers an SOS, or as complex as a supposed-rescuer getting lost or injured.
If you want to help, please think about doing it right. I suspect there are volunteer search and rescue units in your area that would welcome folks with local knowledge and outdoor skills who wish to join.
Thanks for listening!
"I intend to live forever, or die trying”. Groucho Marx