We officially have only one child in diapers. Nate was a rockstar and pulled a dry bed on his first night without a diaper.
I officially swear by this method of potty-training: wait until your kid is BEGGING you to use the potty, then wait another 2 weeks, and then "let" them. To get them out of diapers during naps, wait until they're adamant about not wanting to use a diaper, then make them use it for another 2 weeks, and then "let" them go without. Ditto for night-time diapers.
This has been the easiest process! Laziness wins the day!