I have used a SPOT for the last 4 or 5 years.  I always have a dedicated SPOT watcher.  I choose someone who is tech savvy.  If I push the non-emergency help button it means I am ok but need help getting out of the park and I understand it may be a couple of days before any one arrives.  My SPOT watcher has a list of people to call starting with a local outfitter to get me out. I have also used the non-emergency help as a message to have the outfitter pick me up at the arranged location (Hook Island). I use the spot in tracking mode I figure that will make it easier to find the body.
MagicPaddler