Having served as a consultant on numerous TV shows I can tell you that, due to the liability issues involved, networks require individuals to be close to a backup crew and while it may seem like the host is deep in the wilds, there is actually a support group of 8-10 personnel nearby. Most of the "reality" shows out today are largely about theatrics under tightly controlled and heavily scripted conditions and are no substitute for hands-on training at a reputable survival school.
Don't forget that the bottom line for these shows is to provide a soap-opera via wilderness stuntwork. I have seen many staged events take place for the sake of providing entertainment value to viewers. I recall a show I worked on that made it look like myself and the host were miles from civilization living off the land when, in reality, we were a hundred yards from the vehicles and had two cameramen, two sound techs, a makeup assistant, and two gophers whose sole responsibility was lugging coolers jammed with chilled espressos!
Reality in the wilds is happening out your back door right now. Go for a walk in the outdoors and learn from the natural world. It’s a classroom which is unparalleled with real lessons waiting to be learned.