I gave this advice for a digging problem as well but it does work. stuff a kong toy with something your dog loves, favourite food, treats, peanut butter. Give it to her/him at night when he is bound to chew. It has to be that he can get at whatever you stuff the kongs with, but not too easily. This will keep him busy while you sleep.
The other option of course is to combine the kong with crate training and make his crate his bed/den where he sleeps at night and can't get at your stuff to destroy it. He'll have the kong in there with him,so should adjust to the crate as a happy place.