**But he needs to get down there with his brother and go to the damage site, pass out water bottles, whatever**
Good idea, tie up resources with the secret service securing the area for a presidential visit. NOT! The best thing W can do is what he did, releasing federal funds and staying out of the way so the rescue workers and others can do their jobs. W can visit the area when they have things under control. If he went now, the media would have lots of stories on how he hampered rescue efforts by being in the way.
elected officials, even presidents, routinely visit (or "tour") these types of disaster areas. Bush went to the WTC a few days after 9-11, it can't be harder to secure a location for a visit in florida then it was in lower manhattan after a terrorist attack.