Jeanie, I love what you've done! Very creative and effective!
In my nursery I set up xpens and put either crates with the door open or cut out tupperware inside those pens. The pups go in the crate/tupperware and moms can go into those crates to nurse, but can also have some alone time out in the xpen part and eat/drink in peace away from their babies when they want. As the puppies grow they obviously start coming out too, but by that time I let mom out of the nursery completely for a few hours at a time to have her breaks. Then I start crate training the pups at night by just shutting the door to the crate inside their xpen, and let everybody out in the morning into the big pen area to play. Once they've had first shots I start letting the pups out for a couple hours a day into the living room/kitchen/main area of the house with the adults to begin socialization, but at night they are back into their night time crate to sleep. I never hear a peep out of them because they have learned to be in that crate inside the xpen since they were newborns with their moms, and it's not a scary thing. They also know in the morning I will let them out first thing to run wild!
These pics are not the best with a camera phone but you get the idea.