If you are deported &  lose your hardware wallet &  seed phrase, your bitcoins are effectively inaccessible. Without the seed phrase, there is no way to recover your wallet, harsh but fair & reality..

I see a lot of people talking about brainwallet or having encrypted cloud backup, using these is the same as using an exchange.

What I think you can do is back up your seed phrase, write it down &  store it in multiple secure locations, such as a fireproof safe or a trusted family members home. You can also use a multisig wallet, services like Bitkey offer multisig wallets where you hold two keys &  a third party holds the third. You may also want to consider giving a trusted person power of attorney to manage your crypto assets in case of a legal emergency. You may also want to consult with a legal professional about your rights &  options for accessing your assets after deportment.

The bottom line is, note your keys, note your coins.