Since Aulani has opened we have gone twice in September and once in February. We have plans to go next March.
The February and next year‘s March trip were planned because of whales! We spent a week on Maui in February where we had many sightings, we did not see any when we were in Aulani, but we did other things. Next March we will begin our visit with a weeks stay on Kuaui and then to Aulani.
Weather has been wonderful for all our visits. I think October would be beautiful as well. Winter visits have the added bonus of whale sightings!