I wouldn't use dunk'n'fluff for night nappies they aren't really absorbent enough...
Fluff and stuff heavy wetter ones make quite good night nappies unless you have a heavy night wetter but light to medium wetter at night they work fairly well...
Our night nappies are:
3x Hollow Oak (boosted)
2x First Class Baby (boosted)
Standard Minki Pockets (2x50cm Bamboo squares + 2xEP hemp)
I'm sure I've got more just don't remember