Back to the OP's originaly question, I think that what you should do is tell Disney that any child who is 5 or under is really two. Then they won't "count" in the numbers anyway! Plus, you'll get free food from any of the buffets for them!

And free admission to DL!
This is how I would do it: 4 adults in each Q bed (8 total there), 1 on a chair, 1 (or two if they're small) children in the closet no the floor, 2 children in the bathtub, if you have two babies in there, you can easily put them in the dresser drawers, (just make sure you have them in the lowest ones ones for safety purposes!), the rest can sleep in sleeping bags on the floor.
Oh, and don't worrry about paying for the strollers. A tip that's great! When you get to DL, go straight to Small World (Bug's area in DCA) and just pick up a couple of them! They just sit there empty with no one in them! Can you believe that?! You might even get lucky doing that one....someone might have left without their camera or drinks....save you some money!