Winnebago County does a great job of maintaining their Forest preserves and campgrounds. They charge a fee for non-residents, but it's worth it. Not spectacular, but very pleasant and relaxing. Sites are open, but well spaced. Plenty of shade. Hike-in sites are on the riverbank, about 200 yards from parking.
 The Sugar river is scenic, and easy to paddle up or down, so you can do round trips without having to arrange drop-offs. 
The Pecatonica river is nearby as well. A good day trip is Monroe, Wisconsin, home of the National Cheese Museum and Alp & Dell Chees works, a great place to shop for chees lovers. Van Eyck Orchard is a great stop as well.

This was the perfect end to our camping season. The smell of pine is heavenly here! Shower house still open!

We spent a weekend at Sugar River and thoroughly enjoyed our! The sites are large and well maintained, the hosts were great, and it is less than two hours from home!

There are a bunch of different kinds of campsites to choose from. Rustic ones right near the river are my favorite! There’s an indoor restroom complete with a shower. We’ve done some fishing and plan to kayak there soon!

Not a bad place for exploring the river. Big sites. Lots of mosquitoes so come prepared!