Even one wrong letter, one or two words missing could add an extra layer of protection.

Changing to a new wallet/key when in a better situation would be good too. Also of course a passphrase.

Border wallets (probably best for a temporary wallet and or if needed in a transportation pinch). Paper wallets. You can code your key in a similar way that Benjamin Franklin used code etc. Blockstream has a cool cryptography book that can help.

As btc sessions, not over complicating things for yourself I think is wise too.