My D and SIL rent a cabin for two weeks at a Boy Scout camp that has a Family Camping area. SIL has been going there since he was a Scout himself, and then spent summers running the waterfront while in college. The cabin has shower and toilet, fridge, and range. They have a nice outdoor area, not too close to other cabins, and can bring their dog along. The lake is nearby, with all kinds of boating available–rowboats, sailboats, canoes, kayaks, etc. The campground runs group activities in the evening. They know the families that rent during their two weeks, and the kids have become a pack that wander from one campsite to another. Families take turns hosting bonfires at night. It’s such a perfect combination of outdoors with some amenities. They do have a tent and tent camp at times, but the cabin is a great experience for their family.
They do reserve a year in advance each year, to hold the time and particular cabin they want.