While most of Disney is sensory overload times 12, there are areas to get away for those who need them. There are even some areas designated specifically for guests with cognitive disabilities. If you realise your child needs a place to "take a break," and you don't think you have time to get back to the hotel before sensory overload occurs, ask a cast member to direct you to the nearest quiet space.
Trust me, they'll know exactly what you mean — and they'll get you where you need to go.
Image Source: Leah Campbell