My husband and three small kids (6, 4, and 2) visited White Landing for a long weekend (Friday-Sunday) and it was one of the best vacations we had. Dottie was very friendly and accommodating. The food was surprisingly fresh and tasty. Any time we needed anything we just asked and were promptly helped.
The place is a natural treasure. Amazing snorkeling opportunities, a visiting bison, night foxes, and dear families made the kids appreciate the wild nature of the place. The hike up to the cross is worth the steep climb.
All the above being said, the amenities are quite basic. The inside of the tarp tent got very hot during the day. The mattresses are aimed at groups of kids that usually come to the campsite - quite narrow and hard. We ended up putting them on the floor with our sleeping bags on top, as the bed frames were not working for my tall husband and I.
But this way in"glamping" is certainly easier than camping in a tent anyway, so overall no regrets whatsoever. We loved it, will recommend to friends, and would return!