Hi. Good luck with all your new puppies 
Our Springer Spaniel is now nearly 10 months old, how time flies!
We did sleep downstairs with him for the first few nights, well DH did. We figured that his whole world had been turned upside down already, left mum, away from siblings and group comfort, new surroundings and smells etc. Poor little thing!
It only took about three nights, DH just moved a little further away each night. For us, it was rather that than distressing him and us.
He was crated so rarely asked to toilet at night time, he has a bladder of steel. Maybe once or twice in the early weeks we let him out for a night time wee.
Having a puppy is very hard work but great fun too, I have struggled to bond at times, DH (who didn't really want a dog) loves the bones of him and the DC (especially DS, who is quiet) wouldn't be without him now.
I must mention clicker training - tis great! We also do the KC obedience awards too, which are great for the kids to get involved in.