There is a thread on traveling with Toddlers, you may want to check that one out for some tips that I and others posted:
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In my opinion and it is just my opinion alone - 13 months is kind of young, especially since you have twins. It is totally doable, but it is going to be tough I think. It all depends on what you expect out of the vacation. If you just want to experience Disney World again, then I say go for it! Just be prepared to be very flexible with your schedule. I of course don't know your children, but kids can be super unpredictable especially at a younger age. So I wouldn't go in with a lot of plans or be ready to change your plans on a whim. Based on your timing of May 2022 your children aren't even born yet (congrats btw!) - so you don't really know the temperament of your children. As parents, I think only you will really know your children and how well they will do. Maybe before going, try going to a local theme park in the UK?
Would it make sense to do a shorter trip to Disneyland Paris first maybe?
1. 15 nights is a long time - but it will probably allow you to do more of what you want and still be really flexible. Maybe you hit up the things you really want in the morning and then spend the afternoons just walking around and exploring resorts or something.
2. Is there enough to do? A lot of the shows are closed right now, but they are slowly re-opening them, by May 2022 I think things will be better and there will be plenty to do beyond rides. Maybe character meet and greets will be back by then and you'll probably want pictures of your kids and Mickey
3. Tips for sit down meals - let the kids eat first, then give them something to entertain them. I'm not normally a fan of using tablets or phones as babysitters for my kids, but for sit down meals, I will make an exception to get a bit of peace and quiet. Again, you will know your children and what will keep them happy. Some children are amazing and you can give them a few books and it will keep them happy for a few hours, but it depends on each child.
4. Thrill rides - yeah you just have to suck it up and do it alone. My kids are 4 and 7 now and they still won't ride anything even the least bit thrilling, like I'm talking they won't ride Pirates of the Caribbean or Frozen Ever After because they don't like the "drop". They're their own people, and they have both tried riding those rides and told us they didn't like them - so we let them ride what they want and then my wife and I end up riding everything else by ourselves. It is what it is, I'd rather ride the ride than not at all. Haven't tried Kids Nite Out yet, but we will probably at some point when the parks are open later, maybe do an After Hours hard ticket event some day when they come back.
One tip I would give you with kids that young, stick to their schedules as best as possible. Again every child is different and how you parent is up to you, but if you have a schedule at home with your kids, try your best to stick to that schedule while on vacation. That means - if they have a normal time to eat, make sure you're feeding them at the same time, stick to nap times, stick to sleep times. When they're older you be more flexible, but when they're young we found that meltdowns occur a lot less frequently when they are on their schedule. That though is the way I parent and it works for us, everyone does things differently, just want to share what worked for us
