Put your passwords in a password safe like Keepass, and keep that somewhere in the cloud, PGP-encrypted as an extra layer of security, with a private key that is encrypted as well. Create a special private key for this purpose alone. Download that file when you entered the US and decrypt it.
When exiting, you might wipe the disk if you want to be sure they won't search it when you leave.
When exiting, you might wipe the disk if you want to be sure they won't search it when you leave.