It’s easy to go up a mountain, your path is viewable. Coming down is another matter. All you can see is air. Paths are indistinguishable and, after the third or fourth trip down and back up to start again, you will wish you had brought surveyors tape. Plant it high (and line of sight) as the little bastards like to chew on it and pull it down...
Combine with a gps and one is well served.
