Belive it or not, we spent a day off last week going out to eat for lunch with the kids.
It occupied several hours, allowed for a late morning start (a real windfall for the kids) allowed us an early return home (a REAL windfall for us) and cost about the same as a day away would have cost.
Something to consider, seeing as how 99% of whats out there, has already been done in prior years or Chol Hamoed