I am bringing my iPhone up Langley, with solar charger and trip-specific apps, including a peak-identification app and gps-enabled topo and terrain maps for the area (downloaded so no 3G needed), plus the kindle app for reading during downtime. Plus, of course, the phone and music function (so I could possibly just telephone Joe to cheer him on). I'll see if this techie stuff adds to or subtracts from the experience....
Too bad carrier pigeons are out of style. I wonder what kind of altitude they can handle...
And if it's not God's plan, you can get
Family Radio Service units & chat at prearranged times/frequencies.