Doug,
The LA Governor's official business website is full of smoking guns.
http://www.gov.state.la.us/
First: Governor Blanco's letter requesting specific help from POTUS - wholly devoid of any military request - just asking for job assistance, housing, and cash.
http://www.gov.state.la.us/Disaster%20Relief%20Request.pdf
Second: A list of LA Governor executive orders through Sep 2, 2005. Completely missing here are instructions to the citizenry or militia.
Third: On this official LA Governor's website, political sniping against President Bush.