Yellowstone Lake State Park
I did this park as last minute overnight so I had almost no choice of site as it was already mostly booked. I was pleasantly surprised.
I had visited the park before but this was my first time camping here. Much like other WI state run campgrounds, the sites are well maintained.
The campsite I stayed at felt very secluded even in a full campground. Trees and bushes block line of sight to the other campsites. Sound however still carries really well. So you may not see your neighbors, but you will hear them! There was enough space for a few tents or one great big one. The mosquitos either had not come out yet or the bat houses placed around the park really work, as I had no mosquito problems at all.
The park itself has some nice hiking trails, most of which you can get to right from the campgrounds. The namesake lake is also a good feature, although a bit bland for kayaking or canoeing. There were a lot fishermen out when I kayaked it so it may be good for those who fish. A definite highlight is the Wildlife loop hiking trail. It lived up to its name when I visited, seeing deer, frogs, toads and numerous birds.
Overall, it's a nice state park in an area of the state lacking in options. And the man made lake is a nice feature.