Mukwonago is a good place. It is a bit of a drive maybe like 8 miles away or so but it is chill. Don't go to Kettle Moraine or Bong they are both hardcore about being quiet. We couldn't even be on someone else's campsite after a certain time at Kettle Moraine. There are also tons of private places around there too. If you search online a lot of them have websites and the private places are good about letting you party after a show.
i recommend avoiding the county and state run parks... they seem to come down on anyone who wants to have a good time. We found a place about 12 miles from there called Scenic Ridge. We have camped there for many shows the last few years and they have always been very cool with everyone.. Very Friendly people. Below is an AD I found for them. I hope it helps...
Bark River!!! It's almost impossible to find, but once you're there, it's a great time. Search for it on google.
