While he does express a longing for a simpler life, this is mainly expressed through his desire to live in a remote and secluded location, away from the phoniness and superficiality of the adult world. He fantasizes about living in a cabin on a mountain, but this is only mentioned briefly in the context of escaping his problems.
There is no detailed description of the cabin, its surroundings, or Holden's activities within it. His desire for seclusion is more abstract and symbolic, representing his longing for authenticity and connection with nature.