2 parts are gnerally much better than pockets for night. the only pocket i am successful with at night are the minki ones as they are fleece and quite bulky. (i have one that i keep for DH or babysitters)
my fav night nappy is the bamboo kiwi quick flip (http://www.littlekiwi.co.uk
) which is soo absorbant that until very recently it needed no extra boosting, now i pop an ellas house hemp long insert between nappy and Wool rwrap (couche cover usually)
i have also used a bambeasy with an extra bamboo booster inside the pocket and an ellas house hemp between nappy and wrap with much success.
night nappies tend to be HUGE and need a wrap one size larger than usual to fit over!! but you will certainly never wake up to find it has exploded and there are strange jelly crysals all over your little ones bits...and that is one major major advantage!!