Removed your dates regarding travel so this is not seen as a reservation for rent wanted post. I like split stays and we did them a lot, even with our little ones.
The day we switched resorts, we slept in, enjoyed the pool, and didn't check out until we had to...then, we would do a lunch somewhere, many times at DS...and then head to the park or the resort. By the time we did all of that, it was usually close to check in time....
We are big split stayers and have been since the kids were little. It is doable, and when they were little we knew how to get them a stroller nap....
Funny, we used to be rope droppers and on move-out day, we would do a park day instead of a resort day. I would schedule a lunch in the park, and take the AM to get our stuff together, check out, drop our stuff at bell services, then go to a park for lunch and some fun. We've had varying success with luggage transfer both before and after pandemic, so now we leave our stuff at bell services and then sometime after 4-ish we go back to the original resort, get a car service and pile all our stuff into the new resort. If room isn't ready, we drop the stuff and hang out at the resort pool. (one bag packed separately is pool stuff) FWIW the last time we had a room ready after 4 was 2017. We've always gotten notice our room was ready before 4 - and if it is, it is much better to take your stuff yourself than wait for Disney luggage transfer.
Split stays dont work with kids sometimes.
Kids don’t adjust to the same plans you have. You might decide that the first 5 days when you're close to Magic Kingdom that you'll do Magic Kingdom. Your kids will decide they don’t like Magic Kingdom, only Hollywood Studios and Animal Kingdom.
Then when you switch parks to near Epcot, they’ll fall in love with Magic Kingdom all of a sudden and want to go there every day.
I think it depends on your kids and your ages? My family knows I'm the Disney planner and so they don't usually ask to do something different unless there's a clear reason (everyone knows what the loose plan is each day, or at least what the park reservation is)
I'm thinking (but have never done it), if you just plan accordingly its not so bad, just make your travel day a big park day so you just leave one place in the morning & return to the other?
Yup, that's what we do. If we don't leave for the park until 10am ish then the park time doesn't feel like that long before it's time to leave. The other thing you can do is move luggage etc upon checkout and go to the park from resort #2.
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We recently did a 1-5-2 split - BWV bw view, BWV std, AKV kidani - I would have preferred 5-3 or 4-4 but I messed up our wait lists. Ironically, now that our kids are easier to move (8, 12 - they can carry and pack their own stuff, we don't need to keep a lot of food refrigerated in the unit) I feel like I might actually prefer to stay in one place for a whole week or so. Maybe it's because taking a bus is SO easy without a stroller and because the kids can carry some stuff of their own.