Oh boy do I have experience here. I have 2 kids 12 and 9 and they both wet for years. Family history on both sides was also a factor. Plus we have asthma and allergy issues where the meds made them real thirsty and I'd feel bad and cave at bedtime for a sip of water, bad idea. My kids are major sleepers so they wouldn't wake up for anything. I knew this to be true the night I was walking my son to the bathroom and he slipped from my grip and I landed his head right on the edge of the door. He didn't do a thing and the next morning I touched the sore spot and he had no clue where it came from.
I approached the dr and they of course wanted to do drugs (at this point I was desperate, my son was too old for this). I filled the Rx and then read the side effects. No way- my son could pee for years- as long as he stops by his honeymoon we'd be fine.
We bought the night time pull ups for while and found they actually were an excuse to be "lazy" and pee as he got older we found this out (he admitted to it). So we stopped buying them and made him responsible for cleaning up the sheets. It wasn't a punishment it just gives him ownership of what he has done. Just like if you spill something- its no big deal- just clean it up. Make sure you aren't crushing their spirit in the process. This is embarrasing and makes them feel like they aren't "normal".
Now granted there are times when he was exhausted and I knew he'd wet so he got to wear one. Or spending the night somewhere. He learned how to be discreet with them.
We may have an accident on occasion from one of them but that is when we have slacked off from the "rules".
No drinks after dinner- if "dying" can suck on an ice cube.
Go pee when just getting ready for bed, then again just before climbing in bed.
No dairy in the late part of the day, milk at dinner or ice cream for dessert. For some reason milk takes longer to get through- this may or may not be a myth. We actually completely gave up dairy and ironically thats when most of the wetting has stopped and when we stopped the allergy pills too.
So if you can, do an inventory on your routine and diet and meds and see if anything can be causing this so you just aren't putting a bandaid on it, but actually fixing it. But it to can be an underdeveloped bladder that just needs time. Just know that this will eventually end. He will stop by his honeymoon- I promise!!!