Christopher McCandless

In the movie - before meeting Jan and Rainey - Chris is among huge trees in an old forest and sees a deer... It's from the Pacific Crest Trail but from where exactly?

Thanks

In Alaska he ate rice, animal flesh and edible plants (correct me if I'm wrong), but what about his travels before Alaska? Did he go to a store and just bought whatever he could afford? I've understood that he spent quite long periods of time in the wilderness. So did he just eat rice and the plants...