For me, that depends on three things: time of year, how the child sleeps, and whether you're park-hopping. My daughter (six months first trip, 15 months next trip) is a crummy napper but sleeps amazingly at bed time. We also like to travel during the slower season when the parks aren't open as late, and we rarely park hop. So for us, our plan is usually to go to the parks from open until about dinner time, then get the baby to bed around 7:30. Napping becomes more valuable if the parks are open later at night, if the kid functions better with a nap in general, or if you're leaving the park to hop anyways. Leaving to go back to the hotel is much more inconvenient if your'e returning to the same park, but less so if you're heading somewhere different anyways.You will get many views on whether you should go back to the room for a mid-day break. We never left the parks from open to close and my kids were just fine the entire day. They napped in their stroller if they needed to. It's really something that you need to decide based on your child and how they are doing. Maybe they will be fine early in the stay, but will need a break later in the trip.
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