Two weeks ago the Studio's parade was at 5:30, I recall ... we were actually waiting on our table at Hollywood and Vine when it, uh, paraded by. Just MHO here, but I think of all three parades, the one at Disney/MGM studios is most expendable.
We did OK on the rain issue - one day, it was raining at MK, but dry as a bone at Epcot. How 'bout that? But June and July are the rainiest months in central Florida, so be prepared. They don't make the call on Fantasmic until the very last minute - I've heard of folks waiting an hour or more just to have a weather cancellation. Darn.
I will say that, in over 100 trips to WDW over the years, this was the HOTTEST I've ever been, with the heat index at 100+. Those spiffy little "mister" fans saved us.
You'll enjoy H&V. This may sound like a strange dish to get excited about, but when we were there one of the sides available was creamed corn spoonbread. Our server said that this was the one item the CM's always fought over. Trust me on this one, if it's available.