This house is incredible. We're four families with kids, and we had a blast. The kids enjoyed exploring the marsh, beach, and woods on the property. It was so cold and windy one day that we just stayed indoors, doing puzzles, playing board games, sitting by the fire. The kids played hide and seek and sardines inside the house, and didn't bother the adults - the house is that big. The views are incredible from sunrise to sunset.
The rooms were all spacious and comfortable, and worked perfectly for our combination of couples, 10 yo boys, 11/12 yo girls, and 2 yo baby. The master bathroom was a star attraction. We joked that any kids would need to pass a swim test before using the jacuzzi tub. I think 4 people used it. Another 2-3 used the shower/steam room. So nice.
The kitchen has enough pots, pans, dishes, mugs, etc, to easily prepare meals for over 2 dozen people - plenty of prep space, too. Large table + stools at the counter allowed almost everyone to sit at the same time. AND large coffee tables in the other rooms meant that drawing, games, and puzzles all had their own spaces.
The property is very close to the blackwater national wildlife refuge, where the group went out for a hike, and the Harriet Tubman National Park Visitor's center. Bikes and helmets were provided and used, as were kayaks, and crab pots (though these last, unsuccessfully).
We had a problem with a couple of wasps the night we arrived, and the caretakers came the next day to figure out how they might have gotten in, and solved the problem. We also had questions about how the heating worked (three separate zones!). The owner was very responsive to all our questions.