I am going on a 6 day, 5 night trip this summer and here is my plan.

I am going to email my family a document with the following information:

1: My Hiking Itinerary, including a map. (which I will stick to)
2: A recent photo of me and everyone in my party.
3: A photo of the tred pattern of the shoes I, and others in my party, will be wearing (SAR guys will love you for that).
4: Phone Numbers of the local law enforcement agency of where I will be hiking.

This will all be put into a single email, that way if something happens, it can easily be forward to local law enforcement or search and rescue.