We used primarily snappi'd prefolds (newborn and infant size--not so enormous as a "regular") during the first 6 months (until the "alligator wrestling" stage, when I switched to Fuzzi Bunz for ease!), but, at night, we used a fitted diapers (Kissaluvs plus other brands) with a prefold over it with a wool soaker on top.
DS had a bum the size of Texas when we went to bed. He definitely slanted down from bum to head. However, I never had a leak in MY BED!
FYI to people nervous about cloth, we only had two leaks ever with cloth diapers (in the young baby stage, using PREFOLDS) where we had at least half a dozen with disposables--and we only used disposables a few times per week for going out long distances!