Mark -
Thought I'd jump in quickly and provide some clarification for you on this question. I believe Bret Steffen linked to it before, but "two deep leadership" is not required at all when it comes to aircraft.
There is some additional clarification in the following link:
http://www.eaa.org/~/media/files/eaa...%20rallies.pdf
"Two deep leadership is not required in any of the aircraft typically used for YE flights."
Hopefully that clear up any misunderstanding on the subject, which has been discussed at length for more than a few pages.
Best,
Dennis