I think your last sentence sums it up pretty well. President Bush took it seriously, but the city and state officials either didn't believe the warnings or did not have a good disaster plan in place. That amazes me because everyone has known for years and years (understatement) what NO and other areas down there would face if ever hit by a big hurricane.
I do not know how long it would have taken for water and MRE's to be hauled in to the Super Dome. Was there time? Did they have access to the amount of supplies they would need? I don't know.
I have the same question as you do about the buses. I can't make a judgement call on that because I'm not privvy to the information that the local officials would have had.
By the way with 500 responses on this thread anyone have an update on the situation at the convention center? We seem to have no news. In this case I doubt that means good news.