Why wouldn't you take them with you while traveling? The whole point is to use them as part of your authentication chain.
You clearly misread or didn't read my comment because I didn't say anything about not taking your Yubikeys with you while traveling.
>The whole point is to use them as part of your authentication chain.
I know and that's exactly why I said you might want to be careful with them while traveling. If your keys are taken away from you and you don't have any backup solution (such as recovery keys), you will get locked out of your important accounts.
https://twitter.com/flexlibris/status/660108123487789056
> TSA at Boston airport tried to take my Yubikeys away from me to a second location "for a test". I refused & they backed off but FYI people.
If you have your Yubikeys with you while traveling, you might want to be careful.