L.P.
We had problems with the Goodnites being too large on my peanut-waisted son, to where they would leak more often than not--and pull ups seemed to not have nearly enough absorbency for us to last through the night.
However, one possible solution you could try if the sizing allows is the Huggies 'Slip-Ons'. They've worked like a charm for us at night because they are able to be pulled on like underpants, but have the absorbency of a diaper (since they don't seem to be geared towards active PT'ers).
I know how stressful the constant battle of laundry can seem at times, but hang in there! There is a light at the end of the tunnel, it won't last forever!