Thanks for all your help. At least now I don't feel so alone.
We reserved our exact number of places months ago, so it might be hard to take an extra person at this point. Also it's unlikely we could find a Baloo trained person from another Pack who could go. We are several hours away from the aircraft carrier (Yorktown). If nothing else works I will try that.
First, we are going to call the Yorktown and ask if a tour permit is required by them. A Scout executive told me they would ask for it, but it's not in any of the Yorktown literature we've received.
Then my husband (who is very diplomatic) is going to in to the Scout office to see if they could either waive their requirement or give some special emergency training.