Puppy sleeping through the night

Question
We recently purchased a golden retriever puppy last week at 7 weeks.  She is doing incredible at housetraining (only 2 accidents in her first week), mostly due to our diligence in taking her out and using a crate.  When should she sleep through the night without needing to go out?

Answer
It varies, but maybe in a week or 2.  Taking the water up at 7 PM and making sure she walks around some on her last trip out helps.  

You are right, the key to avoiding accidents is keeping a close eye on the puppy.  A year ago we managed an 8 week old Golden all weekend at a convention without any accidents.