True, JJ,  we sometimes read about people who tried to walk out but failed, and rescuers  find the car first- but the media  usually don't bother to write  articles  about all those  folks  who safely walked out. 
 (I can immodestly state that with all my adventures and misadventures I've never had to sit and wait to be found.  Closest was on a high ridge over the N. Umpqua where w'ed suffered two flat tires, but my buddy had his bike and rode  miles downhill to a phone in a store on the highway where he called a tow truck.)
Ah, Judy, the log truck driver's daughter--we were going up a steep gravely road when the car slipped sideways and ended up stuck with a big boulder behind a rear wheel so couldn't back up, and though we tried putting down branches etc. we couldn't get traction to go forward---
Judy gets her little car jacked up, we push it sideways and it moves as the jack falls over; we do it again and voila, we're clear of the boulder, we back up, and find a way to go forward.