The cabin on the shore of Lake Keowee at Keowee Toxaway State Park in western South Carolina is, I believe, the largest in the South Carolina State Park system. Three bedrooms, two full baths, and that's just upstairs.
Downstairs there's a fold-out sofa and a half bath. Plus the fully equipped kitchen we've come to expect in State Park cabins. All recently renovated. Granite counters, no less.
This cabin accommodates up to ten people!
Working fireplaces upstairs and down make this cabin ideal for any time of year. Families with lots of children, or even two or three smaller families, would be comfortable here
Two of the three bedrooms have views of the lake, and doors leading out onto a wide deck. Don't know if you can see it through the trees in the attached photo, but the cabin rental includes a private dock. Bring along a boat and enjoy the whole lake.
The only disadvantage of this cabin is that it stays rented throughout the year. Probably because the rent is so low. So, make your plans early and get to enjoy both the thousand acres of Park woods and Lake Keowee. It doesn't get better than this.