We (my husband and I) left the kids with a sitter overnight.
Hubby and I have attended a black tie event in January in Detroit for the past 10 or so years with his co-workers and their spouses. And this year, we flew up north for the event, a reception that preceded it, and a fancy dinner after. We flew home the next morning. We were gone just over 24 hours.
The North American International Auto Show Charity Preview is a black tie event that raises money for a list of childrens' charities all in one evening.