Well, my kids are kind of rare and are late sleepers. They also like to stay up late. I, myself, am a night owl, so this works fine for me. For my kids to wake up before 9am is unusual.
Soooo, when we do WDW, we don't wake them up early. If we were to wake them, they would be miserable all day, so we let them get their rest.
I get up early, however and shower, do my hair and makeup, get things ready for the day - usually breakfast in the room (cereal, muffins, etc.), make bottles, organize the backpack, get the girls' clothes for the day out and such. Then when the kids wake up, they basically just have to eat and get dressed. Since we don't wake them up early, however, we usually get into the parks pretty late. This works ok for us though because while lots of people are leaving to swim, have lunch, nap or whatever, we are arriving.
Basically, we follow the kids' leads. They nap in the stroller and the little ones often fall asleep on rides, the bus, monorail, etc. When they're tired, they sleep, when they're hungry, we eat. I try not to make a lot of PS's because of this. We go with the flow. We have been to WDW 7 times with our kids, starting out when our first was 6 mos old, and I will say, we have never gone back to the room to nap. However, we often get back to the room early in the evening, swim and the kids go to sleep. They love to watch the bedtime stories on tv. Usually, that just knocks them right out.
We have stayed out late occasionally for
MNSSHP and to see Fantasmic, and all of the kids were just fine. But we made sure on those days that we took it a little bit easier than usual.
My biggest piece of advice would be to go with the understanding that you are NOT going to see everything. That is what we have always done. If you try to see everything, everyone is going to be rushed and cranky.
Things happen. Babies have huge poopy blowouts in their strollers at MGM

, and then again at MNSSHP where you have to buy yourself a new shirt for obvious reasons

, kids get hungry 2 hours before your PS at Crystal Palace....you get my drift. Just take it slow and enjoy!
