We also put a bed between ours and the wall for DD, and it works great for us! We started off having her bed a few feet away from our bed and trying her in it, but she really wanted to be up with us so we moved it in next to us instead. We didn't really have to encourage her at all, she was more than happy to sleep in it as it is still right next to us. We did get her some cute sheets for it though which might have helped?

DS doesn't co-sleep, he has always been happier on his own sadly despite my best efforts! To be honest though, i am so much more comfortable at night now that everyone is in their own beds!

DS started in a bassinet at the foot of our bed but is now in a cot in the spot DD's bed was in. I can't bring myself to put him in his own room though i think he would probably sleep better without the 3 of us making so much noise all the time! His crying never wakes DD, but she has woken him a few times now. He also wakes when DF gets up to go to work, however DD sleeps through it.