Just got back from a three nighter with a toddler (and her 9 year old sister). The toddler is two.
We requested the crib, and not only was that in our room as soon as we got in, they'd also given us the diaper genie without asking! We told our stateroom host that we only needed the pulldown bed made up since the toddler was sleeping in the crib.
Nemo's Reef was great, but only held her attention for so long. There were some older kids that shouldn't have been in there, and kids who didn't understand the concept of waiting in line for the slide. Other than that, she did seem to enjoy it.
We did the main seating for dinner. Our server was AMAZING. I mean - trying to feed her, bring her whatever we thought she'd eat - amazing. We didn't think clearly the first two nights, and finally brought the tablet for distraction purposes the final night.
She LOVED the nursery. The security is top notch - kid taps their band to get in, and when you check them out you scan your card, give your secret password, and then they tap their band again. The staff was so kind and caring, she instantly took to all of them. Have a diaper bag or other type of bag ready with essentials (diapers, wipes, change of clothes, etc.). They'll label everything with their name. Also, BONUS! Characters do visit the nursery, and they will take and print pictures for free. Chip and Dale came on Pirate Night and she fell in love. Also, the nursery was very flexible in terms of drop off and pick up. We were able to drop her off early twice, and picked her up early as well. We booked her in each night from 8-10 during the shows, which was totally worth the extra cost we initially hadn't planned on.
An unexpected source of entertainment was the live music in the atrium each night. She really enjoyed dancing around and so did a huge group of other kids.
As far as meeting the characters...that's a big judgement call. She did not do well waiting in line, even the short ones. Then she got super excited to run up and hug them, but had no interest in having her picture taken. Looking back, we may have skipped a few. But the Princess Gathering and Anna and Elsa were worth it since these are ticketed and the lines were much shorter. She had the most fun running around with Peter Pan and helping him find Tinkerbell.
She managed to stay awake for the fireworks. The big talking pirate skull scared her a bit. She LOVED the pirate dance party.