Last time I completely re-flashed my phone and only loaded it up with some "travel" accounts that were very basic. It was quite a lot of hassle, though.
This time I think I will just sign out of and delete any cloud services/accounts of concern (including my password safe) from the phone. I will sanitise it of anything I don't want getting into anothers hands.
Once I am safely across the border I can re-download/install what I need.
Cellebrite