For 2010 the way the calendar sets up is a little unique, in that May 1st is a Saturday (making our usual "3rd weekend" for ZuZoo earlier in May), and Memorial Day is late (31st). so there is an extra weekend between ZuZoo weekend and Memorial weekend, so moving back a week isn't a problem.

But in subsequent years this is not true... in general I would hate to get back home just a few days before Memorial weekend, it is nice to have a weekend in between.