Kipawa doesn't seem to need lots of water either. It is there for him to drink, however, to make the night go more smoothly, I remove the water bowl around 8 p.m. He is just over 5 months now, and I can now just get up at 5:30 a.m. to let him pee. That is 6.5 hours of not needing to pee while everyone sleeps.
I actually leave water in his crate overnight, because I was worried about him not drinking enough. He doesn't really use it and at 10 weeks, he is still sleeping through the night. I guess I just hope this continues.