The issue you now have is that you need to backup the method to decode the seed. For example, if it's encrypted you need to backup a) The password and b) The location(s) of the file. You should not rely on memorisation alone as this is a single point of failure.

Also, when you come around to decrypting the seed you should be careful it is done on an air-gapped device (i.e. not connected to the internet). Otherwise the seed could be temporarily exposed and an attacker could sweep funds.

It is much better to not get too elaborate. Physical seed backups are fine. If you are afraid of the backup being discovered, utilise a passphrase or multisig.