My 5 month old doesn't like having a wet bum but until now she would be too sleepy at night to care. But she has started noticing and not resettling until it is changed. Only problem is that changing it wakes her up so she won't go back to sleep for an hour! She wears a boosted LL bamboo which handles it fine - apart from being clammy enough to annoy her. Argh!
Do you use fleece liners at all? i cut a fleece blanket up into large squares, big enough to cover the whole nappy area and this seemed to help. Also we used minki or lollipop fleece pockets for nightime, lots of room for stuffing and fleece inner so bubs felt less wet.
Have you tried a Bumble. This is our night nappy as it is fleece lined and has an enormous pocket that you can stuff. I use a pre fold wrapped around two bamboo boosters or a bamboo and mircofibre booster. We last all night with an olympic piddler 2yo.