Thanks everyone for your opinions

I was thinking of the first week or last week. The only thing about the last week is my girl will miss trick or treat here in our home town, which she really dont want to miss even if we are going to Disney. We have trick or treat always the Thursday before Haloween

I would rather go the last week because of the temps cooling down and
getting out of hurricane season.
We went the last week last year as well. Same feedback others have given you except, from our perspective, we did not think the crowds were low by any stretch. Moderate at best. We may have timed park days wrong of course, but there were some pretty serious wait times and crowd issues at times. One night for MSEP we could not believe the crowds; almost impossible to get around.
Food and Wine was a zoo, we did two different times, one on weekday and one weekend and we didn't really notice a major difference in crowds, and we left around early evening. Also, watch the constant F-bombs and other completely inappropriate behavior you'll see that the F&W crowd throws around. The employees seem to act like fools too. It's not for kids to watch in my opinion. We personally found F&W to be a major disappointment in the quality for price. Likely not doing that again.
We stayed offsite and trick or treated at the hotel and for my kids, it was a blast, because the hotel went all out. It was not the same as home town trick or treating, but interesting and fun to do something new, plus far less candy and other sugar crack the kids normally get.
Finally, Hurricanes are a minor risk in Orlando. Torrential rains are not, but Hurricanes are almost statistically insignificant. I say this now possibly eating crow if one happens to show up this year.
Weather.com has some relatively calming data on Orlando hurricanes.
http://www.weather.com/weather/hurr...urricane-strike-frequency_2011-08-12#graphic4
Overall, weather is good, crowds are okay, and if you are okay with the F&W crowds, or go to Epcot early and on a weekday, then it could be a great time to go.