You can also have thirty or more microSD cards, all of decent size and with encrypted files on them (decent sizes to make a copy attempt noticable due to time consumption needed). Only two or so (redundantly!) have encrypted volumes with what's valuable for you. The decryption key may be only strong enough for the period of your journey. You have it well and unsuspiciously hidden in multiple places in your various luggages, you have it also in your brain.

Don't overcomplicate things or you shoot yourself in the foot.

That way all you have to remember is the password for your PGP key