I'd like to read something where a guy travels back in time, or to a primitive planet, but he doesn't bring any modern conveniences with him. I want it to be about a modern man surviving and interacting in a primitive time/world with the resources that exist there, rather than him bringing modern stuff and teaching the natives about guns etc.
So something like Bob's Great Adventure, or John and Argent, but without all the modern stuff from the future that they bring with them. I think it'd be alot more interesting to read about a man that doesn't have all the stuff he's used to, than about someone that brings the future with him to the past.
Any recommendations?