Can someone who's been during the week in May, tell me about the crowds and planning? We've only been at non-school times. Do we need to plan on an early start for waterparks, like usual? Do we need to plan around EE? Are meal strategies as important?
I think one of the longer lines I saw was for Peter Pan which was maybe 30 mins ... but then other rides like Splash Mountain were a walk-on. If you use FPs, you'll be able to get onto all the rides with practically no lines 
sure it does, but it's only for moments at a time. Our last trip was for 9 days and 8 nights and we had about 15 minutes of rain on our anniversary night right before Illuminations at EPCOT. It stopped about 5 minutes before the show.
There was no more rain after that!