You can use a text from your favorite book or poetry phrase as a "mnemonic" to create bitcoin wallet. That way you don't have to write it and hide it . Just remember that book or whatever is your favorite text.
Because I'm pretty sure entire books, lyrics and other popular text would also probably form part of future brute-force methods, I'd suggest you also apply some simple randomisation of sequence if you choose this method, or mix up the languages for custom mnemonic phrase. Probably quite natural for my Southeast Asian context where people are at least bilingual.
The temptation to use popular favourite texts or poetry is too great to risk I think.
Some above suggested encrypted archived files. Can be further obfuscated by renaming any files to .bat or similar file types people wouldn't look for.