Houston, Shreveport, Memphis, etc. are exactly where food should have been pre-positioned to to support disaster recovery in New Orleans. You certainly did not want to move supplies into New Orleans proper, because it was understood that New Orleans would need to be completely evacuated in the face of a Cat 4/5 storm. Those people need to go somewhere where they can be sheltered and fed. If the people aren't in New Orleans, the supplies shouldn't be there either.
Regarding the Mayor's plan, I direct your attention to this FR thread and the actual New Orleans evacuation plan.
The primary means of hurricane evacuation will be personal vehicles. School and municipal buses, government-owned vehicles and vehicles provided by volunteer agencies may be used to provide transportation for individuals who lack transportation and require assistance in evacuating.There was never any intent to feed people at the Superdome. It was a "refuge of last resort" meaning that it was a temporary shelter to be used only until the hurricane itself passed. There's nothing in the plan about what to do if the levees break and people are trapped in the "refuges of last resort."
. . .
Last Resort Refuge
The definition of Last Resort Refuge is a place for persons to be protected from the high winds and heavy rains from the storm. Unlike a shelter, there may be little or no water or food and possibly no utilities. A Last Resort Refuge is intended to provide best available survival protection for the duration of the hurricane only.
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When it is determined that weather conditions permit, rescue teams will be sent into areas designated for Last Resort Refuge to transport evacuees to designated shelters.
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Well then you have highlighted yet another area where the Mayor did not follow his own plan.....
From the Times Picayune website
26,000 shelter at Superdome
About 26,000 New Orleans residents sought refuge from Hurricane Katrina at the Superdome, which authorities describe as the "shelter of last resort," Lt. Gov. Mitch Landrieu said late Sunday. To help keep them fed and hydrated, the Louisiana National Guard delivered three truckloads of water and seven truckloads of MREs — short for "meals ready to eat." That's enough to supply 15,000 people for three days, according to Col. Jay Mayeaux, deputy director of the Department of Homeland Security's Office of Emergency Preparedness.
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This is why the picture of the flooded buses is so damning.
Not having the levee break in the plan is perhaps the ultimate example of incompetence at the NO government level. We all know that that this was considered a danger.
My response was originally to refute someone who had said that the federal response was slow. In this latest post you seem to be agreeing with me that a poor plan was execrably executed by local leaders.