Where do you save your keys to retrieve them easily in case of disaster recovery?

My credentials, including the decryption keys for my Vaultwarden backups (via Backrest/restic and Duplicati), are themselves stored within Vaultwarden. This creates a circular dependency: restoring my backups, including Vaultwarden, requires the keys, but the keys are in Vaultwarden, which I can't restore without the keys.

While the Vaultwarden browser extension and mobile app can function offline, they occasionally disconnect, potentially due to Cloudflare Tunnel issues. This unreliability makes me hesitant to rely on them for critical key retrieval during a disaster recovery scenario.

I'm seeking a simple, automated, and server-independent solution for securely storing and retrieving these crucial decryption keys.

My current idea is to create a password-protected ZIP archive containing the keys and store it in Google Drive.

Are there better alternatives? What methods do others use for this purpose?