Huge park with a $5 entrance fee! They are in correspondance to the Waukesha County Park System, so it includes a lodge, legacy forest trail, and more. There is a public boat launch on the Southeast end of Lake Nagawaukee, but it's not incredible large or anything. Be wary of the times you visit! Also, there are campsites, but I'm not sure what the fees are. They are modest sites that I believe supply electric/water, and most seem like they have some sort of inground/steel framed campfire. There is plenty of wildlife as well! White-tailed deer, small and large birds, and of course small mammals such as squirrels and chipmunks. There are multiple trails inside of the park as well that wind through the forest and around the campsites. I'd suggest trying out the camping here, it seems like a beautiful place to visit come Summertime!