Disaster Encryption

I work for a large company.  We just contracted with an off-site disaster 
recovery facility.  We have a DR Plan with scripts to get us back up in case of 
a disaster.

My question is what is the best practice for giving them admin passwords.  We 
are a Unix, Windows, Mainframe, etc.. shop.  We also have blackberry's.

My thinking was to set up the following.

We have 8 individuals with authority to execute the DR Plan based on various 
levels of catastophe.  These individuals work in various parts of our state.  

These 8 individuals all have a Blackberry.  My thinking was to place a password 
on their blackberry in the Password Keeper (or a better app).  When they call 
the DR Center they give them that password.

At the DR center we would have an encrypted "vault" on either a unix box or a 
Windows DC (we replicate their).  The DR admin would be told the password to 
the "vault" during the execute process.  Inside the vault would be the user ids 
and passwords necessary to implement the recovery process.

We'll make sure the ids and passwords have the bare minimum they need to bring 
us back to life.

Has anyone seen anything like this or have a better suggestion?