I went 3/5-3/12 this year and everything was perfect. I'm used to going in the summer, so I would have liked it to be a little warmer, esp at night. But it was in the 70's all week, one day it rained and was only 58. But during the day it was perfect. As for crowds, I'll never go in the summer again! We only had to use FP once during the whole trip, and that was our last day when a cheerleading competition arrived. Other than that, we never waited more than 20-30 minutes. I know people who went the last 2 weeks in Feb, and they said President's weekend was really crowded. The crowds shouldn't be too bad early Feb, but the weather is really iffy. It can go either way.