First, you need to differentiate short term vs long term storage.

Long term storage should not be digital, at all, even when using steganography. There's a reason steganography is not a consideration in cyber security. It's simply fun challenge for a hacker.

That being said - if you're needing to escape a dangerous situation and need to be discreet about your bitcoin, there are lots of ways you can do this - but this is the important part. Move your bitcoin to a new, long term wallet as soon as you're safe and able to do so!

To answer your question - assuming there's a need to escape with your bitcoin as inconspicuously as possible - there are lots of options that might not involve typing a seed phrase into a computer. If you don't want to use a brain wallet (which is understandable), you need to be creative and come up with a method that's only known to you. AND (this is also important) - you need to walk through your recovery steps several times to make sure you don't accidentally brick your wallet. Steganographic methods aren't bad as long as you're not using a computer - unless you can 100% ensure your device has not been compromised in any way.

If you think there's a real possibility you may need to escape with your bitcoin, it would be good to establish an analog method of doing so, but not execute it until you absolutely have to.

And, if you absolutely insist on using a computer, I'd wipe the computer after using it to hide your bitcoin in some clever way, and then wipe the device used to recover your bitcoin on the other end. And then finally, transfer to a new wallet that's never touched the internet once you're safe.