I have most of my kids sleeping in the same room. I will sometimes have a child in the hallway which is right next to the sleep room. The child in the hallway is either a child that doesn't nap well, nap as long or is adjusting to dc. Once they are adjusted or sleeping well, I transition them into the nap room as I do prefer to have them all in one room. I am only allowed to have 2 under 2 but I have had that plus 2 just over 2 all in the same room and it worked fine.

I put a blanket on the side of their playpen that is next to another child. They are told this blanket is not to be touched and for the most part, they all listen. It helps when they can't see each other I find. I also have a video monitor so it is easy to watch all of them if they are in the same room. I've had a child climb out of her playpen so I now like being able to glance at the monitor if I hear loud noises.