if you change at night, do you pull over every 20 mintues on longish car trips too? or do you just put them in something like a fuzzibun or disposable to make them more comfortable until you can pull over. i guess i feel like that is what diapers are for. if you change and signal all day long, but it is impractical during your only stretch of deep sleep, in the car, in the middle of the church sermon, or during a papsmear, i think it is okay for them to wait a bit especially if they are not uncomfortable. i admire those who are able to change every pee at night and feel so strongly about it though. i have no help at night with two small children, so for our family, changing at night would be a hardship on my already overwhelmed self.
of course if they wanted me to change (he knows how to ask by saying "diaper"), or if they were poopy, i would.
not too long ago my 3yo wore a fuzzibun at night that he peed in one time. he slept through the night and i did not wake him up. we had a short stint of taking him to the bathroom in the middle of night which made us miserable, so we waited til he could hold it all night to go to underwear.