It's underkill, almost. My partitions are already encrypted, all I need is to save + trash + restore the physical LUKS blocks. I don't need to reconfigure my system or do anything differently when I'm not travelling. It's a low-mod hack that I can even explain to the customs people: I'm afraid someone might try to steal my online banking or financial credentials or something, so I chose to disable my personal partitions temporarily instead of being vulnerable to being threatened. I can't be made to move my money to some criminal's account if I can't access mine.