I have portions of my password safe passphrase stored with certain friends. If I get hit by a bus, those friends will almost certainly work out who each other are and what to do with the snippets they have. (And I "mind" several snippets of passphrase for some of them as well).

Not "nation state" secure, but I'm reasonable sure it's well beyond petty thief, curious cow-orker, 4chan/anonymous, or local LEO's capability to subvert.