It occurred to me that this theme could benefit from a change in the point of view (no pun intended) closer to that of participant. While anyone can put on a blindfold, it is similarly possible to suffer from a power failure at night, with minimal (candle, flash) light available, or to be at a campsite at night in a remote location.
In these cases, mind maps are a way to making a changing scenario, like a puzzle persist and progress to its completion. Human nature being as it is, not many practice this technique when vision and light are plentiful, unless there is no alternative. It does offer another strong challenge to try to solve puzzles (like math problems, chess games) in your head. Blindfold Chess Tournaments have become a popular chess variation. The Math Forum at Drexel University has an archive of mental math techniques that compete or beat a calculator to the answer.
What’s the benefit? You become more portable and have less need for “stuff”.
For those in the United States, enjoy your Labor Day Weekend safely.