While I normally just lurk here for the great info. on hurricanes, I must reply to your incorrect statements as a resident of NOLA and south Louisiana.

Port Fourchon reopened to some traffic Friday, LOOP started offloading Friday as well.

http://www.chron.com/disp/story.mpl/business/energy/5985161.html

There is plenty of gasoline in in the New Orleans area, as soon as they started opening Wed. and Thursday, most
had plentiful supplies throughout the area. Most residents filled there tanks up upon return, so i would say there is more than enough for another evacuation.
We are keeping a very close eye on Ike, but now is not the time to panic.