Our family bed is upstairs and we also have the mattress on the floor. We used to use the Humanity Bed, but now that she can crawl off the bed, it's easier just to have the mattress on the floor.
But since it's upstairs and we returned our room monitor since we decided to co-sleep, for day naps she was sleeping in a carrier. My mom just got her a small inflatable bed for Christmas which she just LOVES. It worked great all throughout the holidays, although my baby sleeps very well even in a crowded room... I have the bed placed in whichever room we happen to be in and she gets her naps in now quite easily. :)
Angela
Mama to Satori (11/04)