Always loved going then. The above posters are correct--the parks are pretty dead, and it's still pretty hot and humid [better than the summer heat, but still sticky]. My first trip with my wife and kids was for 2 weeks in Sept 2004, which luckily [for me] fell right between hurricanes Charley, Frances, [my trip here], Ivan, and Jeanne! We saw some damage still from Frances, and Ivan passed over realtively harmless [it hit the panhandle hard, but then looped back around very weakly]. I think that Frances shut the parks down for a day?
The point is that there is *some* risk from this, so be ready, and be flexible.
Also, while we're talking schedule, how crowded is early Oct? Planning a trip then, probably the week before Columbus Day. I would assume it's okay, but how much do the crowds build for that holiday, then for MNSSHP later in the month?