Orlando Informer lists this as a slow period and Touring Plans lists most days between 5-7 (we'd aim for the "5" days).
Kids are 7 & 9, mostly interested in HP. We may or may not be toting grandparents along. We went to US Hollywood last summer so any of the duplicates aren't make-or-break.
We are rope drop people but kids are usually done by early evening and not interested in HHN anyway, so early part closures aren't a problem.
Depending on reviews, we are debating getting 3-4 day passes to include Volcano Bay.
We have a free Hilton timeshare so not staying on property but thought about booking 1 night for EP (depending on #or people and cost-effectiveness).