I'm interested in potentially co-sleeping w/ soon-to-arrive first baby. I've read up and seen lots about safety and bedding, etc, but nothing about the position of the bed and am still feeling a bit clueless about the specifics. In particular - does my side of the bed have to be pushed against a wall? Ours is in middle of room, and it isn't possible to push it up against a wall. Does that rule out co-sleeping?