There are plenty of possibilities..........
From another thread:
Getting closer here I think.
Real close.
So the encrypted paper wallet(s) go to family members. DeadMansSwitch gets the decryption key, as does the trustee. From another thread:
I changed the colour to blue for encrypted paper wallets to provide distinction between encrypted/unencrypted paper wallets - a version in the original yellow is included in case you really like yellow, just delete 'note_encrypted.png' and rename 'note_yellow.png' in its place.
This solution (encrypted paper wallets) robably isn't ready for prime time, but give it a few weeks and that will probably become a very good method for offline / long term savings that is secure.