It sounds like you just left her in the stateroom at night (unsupervised) while she slept. If that was the case, were there any concerns that she would wakeup and be in an unfamiliar place and have no one with her? Or that she would open the door and wander out and about? (Obviously all kids are different.) This is what has primarily stopped us in the past, but of course a 3 year old is much more advanced than when we cruised at 14 months. It also wasn't too clear if you did any of the toddler play time activities. We didn't get a chance last time but are curious as to how they went.