I think the important thing is that backups are made to a specified location, and then backed up to tape as soon as possible. Your network admins would then have responsibility for the physical well-being of the backups and hence not everything would depend on you. I don't think there's anything you can set up yourself that you yourself would not be able to destroy - that's why you need to involve the network admins. And finally, in case anything does happen to you, make sure all processes are documented.

John