When we have to leave "o'stupid early" I found the best trick was to quietly get dressed, tip toe outside and unhook electric (we have a TC). Plan to eat at a restaurant... there's no way I can cook without clanking a pan and making a terrible racket.
The REAL issue we have is when we wake up our 6 y/o son. He's LOUD & CRANKY at 4-5 am and has no trouble expressing his displeasure at having parents that wake him up when it's still dark. And it's just as bad to have two adults hissing threats of bodily harm if he doesn't quiet down! Now! That type of whispering travels all over the CG. All. Over. (I checked)
So now we have a new system. I hold the door open while my DH grabs our sleeping son out of bed and covers his mouth. Then he runs him into the truck and throws him into the booster seat. I am in the front seat and lean into the back and slap my hand over his mouth (sometimes I gotta hold his head between my hands and really lean into him). DH buckles the kiddo's seat belt and then he jumps into the driver's seat. Once the truck (diesel) starts, we try and leave as quietly as possible. Once we are 1 mile away I release my hold on DS mouth and we spend the next 20 min. listening to our own personal musical H*ll on Wheels.
This has worked out perfectly.... unless someone in the CG is awake and sees us. Then we have an "escort" once we hit the highway.... usually with lights and a siren, but we can't hear it over all the wailing coming from the backseat :)
** please note the joke of the above post. but as some parents know.... it is based in reality** and DS is actually a really good kid and polite... the "absolute silence rule at 5am" is just hard for him b/c he honestly forgets how loud he is.