We just returned from a 10 day stay at ASMo. We recieved a complimentary upgrade to Preferred rooms. Our rooms were in bulding 9 (Woody), first floor, rooms 9724 and 9725. Friends of ours had room 9726. Our rooms were close to everything, yet far away from the courtyard to be nice and quiet. Our rooms did not face the courtyard. That wound up to be a good thing since it was quieter.
The rooms were plenty big, although we did have connecting rooms. I think that if we only had the one room I might have felt cramped though. DH and I stayed in the first room while 4 girls shared the beds in the connecting room and my DS slept on a twin size air mattress in that room.
However, somehow in the middle of the night our 2 littlest girls wound up finding their way into me and DH's beds in the first room, lol.
There is plenty of room for a twin size air mattress if you put it where the table and chairs goes. You can either move the table and chairs in front of the window or put them in the other room if you have connecting rooms.
Here's a photo of just how much room we did have in the room with the air mattress.
Mousekeeping even made up DS's air mattress with fresh linens each day.
I should also mention that the beds at ASMo ARE movable. We first thought we would put DS's air mattress in between both beds. We tried that first, but wound up putting it where the table was because it just worked out better that way.
Hope this helps with the planning!
Jennifer.