Well, it went as well as could be expected for a couple of two-year-olds who have never spent a night away from both parents at the same time. There was a melt-down at bed time, but all was saved by the combined efforts of Aunt Maggie and a judicious application of Davy Jones singing "Personal Penguin" combined with the iTunes visualizer. About 8 hours of mostly uninterrupted sleep was enjoyed by all. (The parents, at least the ones without the four-month-old, enjoyed even more! ;-D )
We will definitely do it again. And everybody, grandparents included, will probably take a nice long nap this afternoon!