Well, I would take with me a notepad with a written story by me containing the 12 words of the seed distributed along the whole text, very well disguised in a way nobody could suspect anything. You just need to be creative to create a coherent tale, what shouldn't be so hard, since seeds' words are really common ones, being possible to add them to any fictions easily.
And I doubt someone would steal a cheap notepad from your luggage or seize it, because there isn't any reasonable cause to justify that at first point.
This suggestion has been given by few people here and guess what the staff at the airports are reading these suggestions too.

Next time if you see them looking at your notebook and taking interest in the story written on that notebook, be alert, they are searching for your seed