Umm.. in the early days, I would use a good nappy on DD that I knew would get her through to the next feed.

Now when she feeds at 10pm we put a BBB on her with a wool cover and it *just* does her (she was a bit damp this morning - so she may be needing to go some more boosting!)

DS is in a dedicated night nappy. I think you only really need a night nappy if you aren't planning on changing them - and you won't really know how much boosting you need until you give some things a go. Tis all just trial and error!!