Fall or Spring
I'd suggest Williamsburg, Va...both Fall and Spring are great, but I love Fall the best because of the gorgeous foliage. It is spectacular, but check for peak foliage season. Mid-October sounds about right. It may be somewhat crowded, but anywhere great always is. You won't regret it. (Would you really enjoy Vegas in the middle of summer, or something similarly crazy?) No, peak seasons are worth the hassle. Colonial Wmsbg is unforgettable for kids and adults alike. (I have a timesharing friend who always, always travels to great destinations in the OFF-SEASONS, and his kids will NEVER know the beauty of a glorious Fall mountain scene, or a snowy mountainside town in Winter, or the beach in Summer! Shame!!!) jme