Having a ham radio license and a small HF radio (or at least VHF for repeaters) would be another valuable trekking resource. No repeaters? Get on HF and put out a call. There's also the Garmin Spot (I think it's Garmin) for sending text messages that some people take into wilderness areas.[...]I carry a high lift jack and strap. As a rule, I tell someone where I’m going and have paid severely the two times I broke that rule. Going with another vehicle is first choice, but I suppose I’ve gone alone at least half the time.[...].