You really need a SPOT or similar device if flying in remote terrain.
I very much second this, to the point of saying that if a pilot won't equip themselves with this simple, low cost equipment, which would greatly affect the size of search areas, should those large areas be being searched at taxpayer expense. Other jurisdictions are not so giving of search resources.
For those who have not seen/remain unconvinced, the person you appoint to follow your progress, gets a computer screen showing where you have flown, like this:
Wherever the last SPOT mark is, is where you were within the last ten minutes. If your line of SPOT marks is straight, ahead from your last waypoint for ten minutes worth of flying is the first place to search. If the SPOT was destroyed in the crash, 'doesn't matter. 'Makes searching kinda straight forward!
Millions would have been saved had MH370 had one!