1. Illinois Department of Natural Resources (IDNR)
   The Illinois Department of Natural Resources (IDNR) is the primary state agency overseeing public lands, including state parks and recreational areas. The IDNR website provides comprehensive information on camping in Illinois, including locations, amenities, and reservation options. It's an essential resource for anyone planning a camping trip in the state. Visit IDNR Camping
2. Reserve America
   Reserve America is a popular online platform for booking campsites and RV spots across the United States, including many locations in Illinois. The website allows users to search for campsites based on location, amenities, and availability, making it easy to plan and reserve camping spots. Visit Reserve America
3. Hipcamp Illinois
   Hipcamp is a platform that connects campers with unique camping opportunities, including private land, farms, and other non-traditional camping spots. Hipcamp Illinois features a variety of camping experiences, from traditional state parks to more unique private locations. It's a great resource for those seeking unconventional camping spots in Illinois. Visit Hipcamp Illinois
4. Illinois State Parks
   The Illinois State Parks website offers detailed information about the many state parks throughout Illinois, including camping options, hiking trails, and other outdoor activities. It's a useful resource for exploring the state's diverse parks and finding a perfect camping location. Visit Illinois State Parks
5. AllTrails Illinois
   AllTrails is a platform that provides information on hiking and outdoor trails. AllTrails Illinois lists a wide variety of trails, many of which are located in or near camping areas. It's a valuable resource for campers looking to explore the outdoors and find trails for hiking, biking, or other activities. Visit AllTrails Illinois

These websites should help anyone interested in camping in Illinois find suitable locations, book reservations, and plan outdoor activities during their trip.