Co sleeping with new born and the rest of the family!!

Ok so this is my problem! I am currently pg with bubba #4 due in September. I have 3 year old twin boys and a 21 month ds. Some nights we are all in my bed including dh!! We have put a single bed next to our bed for extra room. I will be bf my next baby but not too sure how night feeds will go! I co slept with ds3 until he slept through but really can not do it with so many people in the bed!! Has anyone used the cribs that attach to the side of the bed? And to top it off it's me that the kids want to sleep next to so they will follow me wherever I go!!

I only have one DS and he has just spent his first 2 nights on the floor on a queen size mattress in his own room (with mummy next to him). Prior to that we were all co-sleeping in our bed. We had thought about what we would do if he was still co-sleeping when #2 came along and we had decided that we would jut put our king size mattress on the floor and another king size mattress next to that.... I reckon that would have done it! Not sure if you have the room for that though? Or could you make another larger room in your house a 'sleeping room' and turn your bedroom into a parents retreat?

dd1 went onto a cot mattress on the floor next to our bed (the mini mattress as we call it) and we just said there isnt any room for 4 in the bed when bub came along. she was fine with that.