Diapers & Diaper Changing: Myself, Parents' Choice

Any Suggestions for Diapering Techniques to Prevent Overnight Leakage?

I have a 7 mo old boy, who mostly sleeps through the night - approximately 12 hours. Each morning, or in the middle of the night when he awakens, his diaper is totally soaked and it leaks through to his onesie & fleece sleeper. I have gotten into the habit of double diapering with the front of the upper diaper positioned as high as possible. This doesn't always do the trick. I have been using Pampers Cruisers Size 3 at night. I use Pampers Swaddlers Size 2-3 during the day. He weighs about 18 lbs and is 29" tall. Any advice would be...