For people who are concerned about having their devices seized at US airports starting Monday when ICE "assists" the TSA, EFF has this guide: https://www.eff.org/deeplinks/2025/06/journalist-security-checklist-preparing-devices-travel-through-us-border

A Journalist Security Checklist: Preparing Devices for Travel Through a US Border
We wrote this checklist to help journalists prepare for transit through a U.S. port of entry while preserving the confidentiality of your most sensitive information, such as unpublished reporting materials or source contact information. Itβs important to think about your strategy in advance, and begin planning which options in this checklist make sense for you.