You're using the same facilities that you trust for your other backups. Recovery is relatively straightforward. Only now, if a tape goes missing on its way to the facility, you don't have to worry as much.
(Yeah, I know that some of you send a dozen tapes to different facilities guarded by warring factions of ninja assassins and you encrypt your encryption keys such that 9 different people have to authenticate 9 different sub-keys in order to reconstruct the master key. I'm not talking to you. I'm just saying that some encryption to protect against random idiots is better than none.)