For us on our summer trips it depends on many factors:
o How old are any children
o How hot is it that day
o Did we start the day at DL or DCA
o If we started at DL did we do the Magic Morning
o What FPs are we trying to get
o What are lunch plans
o How late we think we will be out
What that means for us is that we start at DLR at 7AM for MM or 8AM for regular opening we usually break any time from 11AM to 1PM depending on the above factors. However, if we made a decision to sleep a little more and just start the day at DCA at 9:30AM or 10AM we may delay the break until 2 or 3PM just so we can get in a solid block of hours there (4-5 hours).
We usually do hotel breaks for at least 3 hours and sometimes 5. That is the time from when we walk out the park gates until when we re-enter the park gates. But on days we eat lunch or dinner at DTD it will be longer.
If we delay the break until 1PM then we snack in the morning and eat a late lunch at that point. We use lunch breaks for FP collection. For example, we get a FP before we lunch, take the hour for lunch, then we get another FP after lunch.
Everyone gets a swim and nap and when that happens for us we feel so fresh as we come back into the parks my kids usual vocalize how good they feel.