Re: sleep diaper??
Your DS is a cutie-pie - I love his little kissy lips in your avi
I have found the best combo for night is a fitted diaper under a wool cover/soaker. I don't have a heavy wetter but many people who do say this combo is bullet proof. I use (usually) an Sbish fitted with their doubler then a wool (usually interlock because it's thicker) cover, and DD stays in it for 12+ hours with zero issues.
Happily unmarried mama of 3 (sometimes 4 when SO forgets his age) and some of those other funky acronyms mamas use here...
"I did then what I knew how to do. Now that I know better, I do better." Maya Angelou