Take your passports with you, if you get stuck, it can be helpful to have a passport. Many non-revs don't think of that so when flights start cancelling, you have the option to go through Japan and you may be much higher on the priority list. You must be doing ZED since WN doesn't have any flights so you'd be near the bottom of any list but the list will be shorter on international flights. I ended up flying through Japan both ways my first time to HNL, I would have never made it otherwise, too low on the list. I know it's not ideal with a 5 yr old but it is better than being stuck in the airport for a couple of days.