I think in the best technical way to get through without the agents being able to detect that you have a single satoshi. The most logical would be to memorize the seeds but relying on memory would not leave me 100% at ease. Is there another feasible, safe way?
I'm travelling more than often and most recently proceed through customs with Tails on SD card the persistent volume of which holds all sensitive information that need. The content of persistent volume may be unlocked only with my hardware security key (accessed via PIN) - small dongle on my keying with the bundle of keys from home. Customs pay no attention on this stuff. I think this is feasible and secure way thus reap its benefits after reading
this topic.