Yeah, people love to LARP being Snowden but never actually have anything even theoretically worth being sent to border-jail over protecting.
And, if you do, and you're really asking hacker news for opsec advice, I would suggest you abandon your career as a super-spy or whatever you're doing, because you're doing it very wrong.
Have a phone just for travel. Different account. Only have things you actually need during travel on it. Turn on a cheap plan when you need it. If they ask for something just say you can't remember and let them keep it.
And, if you do, and you're really asking hacker news for opsec advice, I would suggest you abandon your career as a super-spy or whatever you're doing, because you're doing it very wrong.