I am planning to visit a security conference in the U.S. and I am unsure about how to prepare myself and my devices for immigration. What are sensible technical measures to take and situations to expect?
On a personal level, I'm afraid that because of my infosec background and intention to visit a security conference, I might be singled out for interrogation or even denied entry if border officials decide that "hackers" can't be permitted. On a technical level, I'm afraid I will be asked to give access to my laptop and phone for which I want to prepare appropriately. What are things to consider for someone with an infosec background when passing U.S. immigration - especially regarding the technical setup?
(I'm not primarily asking for opinions but for founded advice on what (technical) measures are important when traveling to the U.S. as someone from the infosec field.)