If so, don't use anything from literature or too easy to remember, see https://www.coindesk.com/brainwallet-bitcoin-wallet-shouldnt-use https://www.coindesk.com

If so, don't use anything from literature or too easy to remember, see https://www.coindesk.com/brainwallet-bitcoin-wallet-shouldnt-use https://www.coindesk.com/brainwallet-bitcoin-wallet-shouldnt... I guess for the purpose of travel, and you really need to, you can always use symmetric encryption to encrypt your seeds with a strong passphrase, then travel with that.