Worth remembering: US citizens can play chicken with CBP and lose nothing more than their computer/phone hardware (perhaps having it returned 6 months later). But non-citizens, possibly including LPRs, cannot: if an alien attempts to cross the border with a device they can't unlock "because they don't have the corresponding 2FA token with them" (as one friend suggested they do), they'll be detained, their devices con…
This seems like a perfect use case for TrueCrypt hidden volumes or similar: https://www.howtogeek.com/109210/the-htg-guide-to-hiding-you...