Sometimes it's enough to leave enlightening information, in a place where we know that our family/friends will look when they are packing up after a very serious accident.
If your family is not into crypto and Bitcoin and doesn't understand what a recovery phrase is, they need to be made aware of the importance and dangers of a recovery phrase. You wouldn't want your child or wife make a photo of the seed and place it on Facebook asking their friends does anyone know what this is!?
Sure! You are absolutely right. It's always good to let me know in advance how things basically work.
Now, along with that saved information, you can add additional information with instructions on what to do with that data.
In addition, you must have a wallet with Bitcoin, in which you will not need to use the key to access, just use the password you defined to access. Unless the equipment holding the wallet was destroyed in the accident, or if it is a paper wallet.