Whether you're crazy or not depends entirely on what week that break is. If it's over Presidents Week, the place is packed, although it isn't as extreme as the Christmas crowds. If it's the week after, the crowds are minimal. I would assume the same is true of the couple weeks before Presidents week.
The weather in February is fickle. Both times we've been in Feb, in the same week we've seen temps in the 80's and temps in the 30s. Some days with temps somewhere in between too.
And remember, if the week is an uncrowded one, less will be happening. No spectromagic, etc. If that's important, it's something to consider.