I've found that what is important at night is getting all around protection. Pockets no matter how much I stuff will leak because there is nothing on the side to absorb. I prefer fitteds because of their ease, but a fastened prefold with another trifolded inside would work just fine. I use a wool soaker for my little one, and a wool wrap for my toddler. DS uses Cricketts and DD uses swaddlebees OV with a large berry plush hemp inside (she pees a lot.) I've also used a bamboozle and liked it for absorbancy, but the flap annoyed me for some reason. Anyway, I think that fitteds and wool is the best for nighttime and I use exclusively aios during the day.
CPST and SAHM to DS (4/20/06) and DD (6/13/08)