Nate is still awake every 2 hours. I don't change him at all overnight. He has dedicated night nappies (has never worn a disposable at all) that yes while they are damp, he in't any the worse off for.

Darcy only ever wore a BBH with cover as a night nappy.

If you are concerned maybe try a fleece or wool cover as these are breathable and let some of the moisture evaporate and the skin breath whereas PUL doesn't at all and isn't really for long time wear.