My Random Blog
I think that you should mention having a triage person assigned ahead of time. This is huge for us. Our planning people tend to be poor at dealing with emergencies and the triage people are bad at planning. Knowing that you need to hand over operations from the "planning to the emergency" people in the case of a disaster can be huge.
Might want to mention having a "management guide" in the DR manual. A set of rules about how updates will be given, who can request updates, who can override process and so forth. So that way if a middle manager demands something, the team can pull out the DR guide with the CEO's signature on it and say "sorry, CEO says this is what I do, and that you have to leave now."