Campgrounds near Union, Illinois sit in the rolling prairie landscape of McHenry County, with elevations averaging 900 feet above sea level. The region features a mix of hardwood forests, restored prairies, and small river systems including the Kishwaukee River watershed. Most campgrounds remain open from April through October, with closures during the winter months due to the harsh Midwestern freeze-thaw cycles.
What to do
Fishing opportunities: Thomas Woods Campground provides access to fishing ponds within the Marengo Ridge Conservation Area. As one visitor noted, "Great hiking trails, a pond for fishing, private camp sites" with trails directly accessible from the camping area.
Hiking trails: Rock Cut State Park offers extensive hiking options within its 3,000-acre property. A camper explains, "There is boating and fishing as well as swimming in the lake. The campground staff is very helpful and do a good job at keeping it clean and well maintained even with the large number of visitors."
Swimming: Sycamore RV Resort provides lake swimming in a maintained beach area. According to a reviewer, "Nice lake for fishing and a beach area for the kids to go swimming... Bathrooms are immaculate and are locked with electronic key cards. Close to DeKalb."
Wildlife viewing: Woodland and prairie animals are common throughout the area. A visitor at Thomas Woods mentioned, "My 'leashed' dog loves this place, as do I" while exploring the "Beautiful IL woods and prairie" with opportunities to spot local birds and deer.
What campers like
Private campsites: Thomas Woods Campground receives praise for its secluded sites. A camper shared, "I stayed in one of the tent camping sites with a little walk up (parking for a car available about 50 feet away). Nobody else was camping within sight of me, which was nice."
Clean facilities: Chicago Northwest KOA maintains well-kept grounds. A visitor mentioned, "This campground has really grown on me a lot. My family and i have seen the newer owners clean it up, remodel sites, add new equipment for children and added more activities too! It's really a fun time here OH and the bathrooms are really clean!"
Convenient location: Multiple campgrounds offer proximity to Chicago while still providing natural surroundings. One camper at Chicago Northwest KOA said, "Far enough from the city lights, close enough to civilization. Cozy, small park with friendly staff and plenty of amenities."
Lake activities: Multiple properties feature fishing ponds or lake access. A visitor to Sycamore RV Resort noted, "Great fishing and nice beach for swimming. Very nice shower/laundry house."
What you should know
Limited showers: Some campgrounds lack shower facilities. At Paul Wolff Campground, a camper reported, "The vault toilets are clean but smell like vault toilets at 95 degrees. There is one very clean flush toilet building but no showers."
Campsite spacing: Site proximity varies widely between campgrounds. A reviewer at Chicago Northwest KOA observed, "Very nice campground. It's on the smaller side and the RV sites are a little close together but they have it set up where your RVs doors open on opposite sides so it gives a little privacy."
Seasonal restrictions: Most campgrounds operate within limited timeframes. Thomas Woods Campground only offers "Limited to weekend camping, but spread out private-like tent sites."
Staff presence: Campground monitoring varies between properties. At Thomas Woods, one camper noted, "The campground host needs to lighten up and shes out on the gator every 30 minutes, that gets annoying."
Tips for camping with families
Kid-friendly activities: Chicago Northwest KOA offers structured programming for children. A visitor shared, "Plenty for the little kids to do, and the text message communication was great with regards to weather updates or any goings on around the campground."
Playground options: Lehmans Lakeside RV Resort provides play areas for children. The resort features "a secure, fenced dog run area and walking paths around their lake," making it one of the most dog friendly campgrounds near Union.
Noise considerations: Some campgrounds enforce quiet hours strictly. A KOA camper mentioned, "There are a lot of activity for kids on the weekends. People are nice to you. Plus they have a quiet time at night. So people and kids can go to bed without a bunch of noise."
Site selection for families: At Thomas Woods, "We did our first (family of 5) camping trip at Thomas Woods. We were at site 4 which is electric hookup and it was a huge area! The kids had so much space to run around and explore. They loved the well pump."
Tips from RVers
Setup assistance: Staff helpfulness varies between dog friendly campgrounds near Union. At Sycamore RV Resort, "When we arrive, the host will bring you to your site and just listen to his directions and he will get you into your site perfectly. I asked if I could bring him on my future trips. I've never parked so easily."
Site types: Northwoods RV Resort provides full-service sites. A reviewer mentioned, "The sites are pretty big. The campground is not congested at all. The people are very nice. Everyone waves to everyone."
Utility reliability: Check about electrical service before booking. At Rock Cut State Park, one camper reported issues: "We have a 30 amp trailer. When we got there, the electricity wasn't working. It was 93° on a Saturday."
Pet accommodations: For those with dogs, Lehmans Lakeside features dedicated pet areas. A visitor mentioned, "Lots of dogs so be prepared for early morning barking," reflecting the pet-friendly nature of many campgrounds in the area.