Ilgar I think 10 fake profile should have same passphrase for ease of remembering, or even same to outdoors user passphrase. and better to end session of main profile when going outdoors in case if attacker is smart and force you to give owner profile passphrase because of adb access.
2 outdoors profiles, 1st with simple passphrase, same to 10 fake secondary profiles randomly configured, that you will use as actual outdoors profile with maps, camera, etc, and 2nd with good passphrase, maybe same to main profile (for ease of remembering) with all data (password managers, etc) that you will use for messenger notifications but it will be hidden behind password.