"I'm going to create an adventure for my children/grandchildren/great grandchildren/etc to go on.
At first it will be like "Care packages" and "Treasure boxes" being buried/placed/sunk/etc around the globe, as I travel. To save just in case...
But then eventually, once everything is stable, I will start leaving things with clues, and leave trails, and riddles, and landmarks, and all kinds of ****...
Then make TONS of maps, and some family heirlooms (rings, belt buckles, books, etc) pass them down for generations, and I'll leave codes, or riddles.
And the riddles will go along with the maps. Then depending on how many are kept, and how many people pay close attention, it could take 10-1000 years for a family member, or some RANDOM person to stumble on the clues (or enough clues to get started).
And some pretty cool stuff/secrets/items can be left. Like a...Time capsule..But, bigger, and MUCH cooler
Maybe even try to get other families involved, so our ancestors can tell stories to each other, about their fathers/grandfathers/Great Grandfathers/etc
Like everyone could TELL their kids about the other people, and tell them they may meet the other ones one day, and what they may want to hear about
Like I REALLY want to leave my family an adventure full of secrets, random treasures, and old family friends "
I guess it would be interesting to find places that my grandfather went to. Along his travels, he kept about 1/3 the hotel key rings for various rooms he stayed in as a stage manager for a theater production company, and had a collection of hundreds of keys, many that said the city name, not the state, and had a phone number like PN 9-2828
So I guess most where from the 30's to the 50's when he retired. It would be interesting if he had given more information to each key, and I had the time to go visit the cities that he was in over 50 years ago. Some nearly 100 years ago. I did have some of his letters of introduction that his father wrote back around 1905, when my grandfather was in his 20's, and wanted to become a apprentice in the theater industry.
It would be interesting for your grandkids to follow along the treasure maps and find out of the way campgrounds where you might have found a tree that is 75 feet from the restroom, and buried 10 feet west of it is a small box, with a unique item in it. Yet you would have to be careful to select locations well, not adjacent to the restroom, as a worker will find it and dispose of it when making repairs to the water lines or something. And of course not in between campsites, some day they will dig those up to install new electrical wiring underground.
The trees will fall over with time, and be replaced with new ones. So it will be truly interesting if they can find it 100 years from today. And you will know that your grandkids will be visiting the areas that you once visited in your retirement years.
Have fun setting up the stash of goodies all over the place. Hopefully at some point they will have interest in locating some of these things.
I am also interested in finding out how you will seal these things in a airtight box, and seal it so they can still get into it 100 years from now? I am thinking that a 1" diameter copper pipe, sealed at one end with solder, then the items inserted, then sealed at the other end with solder without overheating the contents will work. Then a simple tubing cutter can open the item in 100 years, leaving the contents undamaged. You might leave a slip of paper with your phone number and name, describing the item for someone to read 100+ years from now, when it is discovered. They might say 'What is a cell phone number?' Or this phone number only has 7 digits, it must be from the 2020's or something?
It might remind them of reading a old phone number like we might read a 1940's telegraph and think "Why are there so few words?" This was hand delivered for only $1.15? That was a couple hours wages back then.
It sounds like a fun project for you now and the future generations. Maybe you could try starting a small one now so that you can watch everyone get into the treasure hunting. We stumbled on some type of family travel game a few years ago. An envelope with a clue about the next place the family would be visiting was taped to the underside of a bench along a trail in a park.