We got there before that. We find parade time a great time to get on rides, but we got trapped in Liberty Square by the parade ropes and decided we could get a pretty good spot to watch the parade, so we stayed.
I know what you mean by losing the kids, or in my part my dawdling DS12, who's always way behind DH and DS7. So it's up to me to make sure the eldest makes it to the exit with us. I think Epcot after Illuminations is the toughest, perhaps I need night vision goggles.
Back now to watching the weather to tweak my packing list. Thank goodness for lightweight long underwear(doesn't take up anyroom) and convertable pants.
Look for us, if it gets chilly we'll be the family of 4 in brightly colored Lands' End 1/2 zip fleece tops.