When our kids were 5 and 3 we were doing 6 night/7 days and driving and always felt VERY RUSHED. Now kids are 18 and 16 and we do 8 nights/ 9 days and fly and we take our sweet time. Pick a day to sleep in, pick a day to not go to a park (unless just for dinner). We feel the longer you can stay then the less you will feel you need a vacation from your vacation!!