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The densest way to communicate "Sam and Frodo walk across the plain towards Mt. Doom. They're both really tired" is exactly thatUh, yes. This is press-release speak, optimised for a fourth grader’s reading comprehension.
If, on the other hand, you want to develop the motif of the Unseen—central to Tolkien’s work—the type of tired the characters are and how they’re detecting and addressing it is incredibly germane, interesting and totally lost in your summary.
You’re also describing the first scenes we see through familiar eyes of Mordor. The landscape is an extension of Sauron’s will. The contrast with the developed, organised, albeit crowded cities of men; the arrogance implied in the desolation; et cetera pack information lost in your summary.