I had this problem too. I started changing Olivia's diaper before I went to bed, 11ish pm, she usually had done a pee around 10:30 - 11:30pm. I began using the huggies night time pull ups (new huggies diaper I think). Since then she has slept wonderfully, no wake ups. now she'll call out in the middle of the night & ask to pee because she likes being dry. I was afraid that changing her before bed while sleeping was going to be disastrous, but she became used to it by the 3rd night, has no memory of it in the morning. As for wanting to pee around 1 or 2am, we just pick her up sit her down on the toilet, she does her business, pull up back on, up go the jammie pants(she does not sleep in a one piece outfit), back to bed, no problems. She has been dry all night for the last 2 weeks & day time trained, in super absorbant underwear since she was 25 months. we started cutting back or notoffering drinks past 7:15pm, upstairs for bedtime routine & a pee at 8pm. We only offer a drink of water if she asks, or is sick & needs to increase her fluid intake. It worried me that she could hold her bladder that long, but she is also sweats alot
during nighttime sleep. Apparently her father was the same way with sweating when he was a child, so the fluids still get out, not sitting in her bladder.