I would do earlier in February in 2015. The problem you will run into with your later dates is that Mardi Gras is earlier - February 17, 2015 and it will be mobbed. We went February 2012 and it was great - weather was beautiful, broke a heat record one day, low crowds, etc. In February 2013, we got very lucky with the weather again and hit a record high of 89 one day. That being said, Mardi Gras was early in 2013 and it was crazy, mobbed. All the people expecting the normal lighter crowds were shocked. I wouldn't do Mardi Gras week again. We also did February 2014, and it was colder and rainy most of the time. Everyone was buying ponchos and jackets. The weather is hit or miss but I enjoy it more than the sweltering heat.