I very consistent in bed by 9pm and up by 4:45am for work Sunday night thru Friday, I do think that forcing myself against my natural sleep cycle can be a cause for my night time wetting, because I'm up early by night fall during the week I can hardly wait to go to bed by 9. Once Saturday hits and if I sleep to 8am I'm actually good, useally Saturday night is my "dry night" but I don't take chances. Like others have mentioned I think I generally wet between the hours of 11pm and 1am, I sometimes wake up at 2am and I put my hand in the front page of my diaper and I know it's wet. I just roll over and go back to sleep.
When it first started happening consistently I was worried, but I know I sleep so soundly that it just a regular thing for me. Considering I'm fairly healthy, in shape, and only social drink (except a couple times a year, then I'm reminded why I only social drink the next day due to bad headaches) plus I'm a DL and thought it was kinda cool, which turned to a normal event of diapering every night.