I used a good fitted with wool or a bg stuffed with two flip organics and wool overtop for my super heavy wetting son. My daughter is allergic to wool though and not so heavy of a wetter so I have been using a OS amp pocket stuffed with an infant ODC bamboo terry square and a booster or a thirsties hemp or flip organic prefold with a booster and no leaks so far.
I would look into getting some hemp or bamboo for overnight and try you pockets stuffed with that.
Engaged to the love of my life and mama to our sweet little Kai bear born 2/12/2010 and our new little princess Savannah born 3/16/2012
baby wearing, cloth diapering, EBF, semi crunchy mama origionally from BC now a resident of good ol' AB