I started caching just a few months before my father died so I didn't get a chance to show him the game or tell him much about my newfound hobby/addiction/sport. His final resting place is just a few yards from the cache. Being the gadget fanatic and people watcher that he was I think he would get a kick out of seeing how many people actually use GPS to navigate their way to the cache and make the find.
Enjoy. And as always, please be respectful of the surroundings.
The gates do not close but if I were you I would still use the sunrise and sunset as a guide.
~RCD (of MMRCD)