When you're into extreme stuff you should take extreme precautions. The chances of me ending up unconscious in a ditch in the wilderness are nil. This wasn't always the case and I'd make sure to plot my route and have check-in points set up in advance which is the way to do that. Your fall into the ditch may destroy your fancy gear and then what? But that stuff certainly won't hurt to bring along on a risky trek (and on plenty that don't look all that risky, the weather can really get you).