We go every summer and like more of a camping feel. We stay at Jellystone Campground -- our kids call it Yogi Bear Campground. They have cabins, (with bathrooms, full kitchen, heat & air), that sleep up to 8. They also have trailers with the same amenities that sleep up to 6.
There is a small waterpark/pool for the kids. They also have a ton of activities -- hayrides, movies, parades, karaoke, crafts, a game room. And each week has a different theme -- we've gone during Spongebob Squarepants week, Scooby-Doo Week, Christmas week (Santa is there.)
For waterparks we do Noah's Ark -- an outdoor park.
Some other fun things to see/do: 1) Circus World Museum in Baraboo. 2) The Ducks 3) A boat tour of the Upper Dells or Lower Dells. 4) Deer Park