Hate to say this, but, its not a wise thing to do. Especially in the post 9/11 world we live in now. Seeds are easy to hide, but if they are found, you have to deal face to face with the feds. Fuck that. They are not going to give you a letter and send you on your way. You will do a few days in jail, at least. Add to that, bail, court fees, fines, plus attorney fees. You are crossing a national border with seeds that are clearly illegal in the country you intend to enter.