It’s probably the closest camping to downtown Chicago. About 5 years in existence. Clean facilities with a few trails. Camp Sullivan is used a lot by scouting groups. There are lots of trees and it is somewhat woodsy. The best thing to me is Jack Gibbons’s, a restaurant directly across the street.
Our trip to Camp Sullivan was mostly a test run to determine how our new dog handled camping. The campsites are pretty crowded, you can easily see and hear your neighbors the entire time you're there. The bathroom facilities were clean with an average level of amenities. We tent camped, but could see the cabin grounds which looked nice. However, important to note dogs are not allowed inside the cabins. Overall it was an okay spot to test our dog's temperament, but the closeness, expensive fire wood, and lack of extensive hiking trails means we probably will not return.
Located in a Cook County forest preserve this family camping option is a nice local getaway. The facilities are all newly built or remodeled. The bathrooms are modern. The campsites are well kept as are the grounds. There are trails to walk. There is an activities barn with a rock climbing wall. There are smaller family cabins with heat available to rent as well as large bunkhouses for organized groups.