US Army Corps of Engineers · Illinois
South Marcum (Rend Lake · USACE)
Near Benton, Illinois — $22–$30 a night and rigs to 50 ft by our record.
Quick answer
Can I bring an RV to South Marcum?
What length RV fits South Marcum? Our record: South Marcum takes rigs up to 50 ft. 6 months ahead via Recreation.gov. Book on the operator's own page.
- Open: Our record: April through October.
Camping at South Marcum? Tell us the nights.
One email when an Illinois owner lists a rig for those nights.
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On the ground
Largest USACE camp in southern Illinois. Rend Lake bass-tournament traffic March-May; book the family-quiet weekends June-July. USACE Senior Pass halves the fee — apply at gate not online.
From our record
- Open
- April through October
- Booking
- 6 months ahead via Recreation.gov
- On site
- Water + electric, Showers, Pets allowed, Fire rings, Dump station
- Camping styles
- RV-friendly, Tent camping
What a posted rig limit measures
- Pad length — the rig plus anything it tows
- Height — what the branches and the awning need
- Turning arc — the swing off the loop road
Keep planning Illinois
More Illinois campgrounds
The rest of the Illinois trip
South Marcum (Rend Lake · USACE) questions
- What length RV fits South Marcum?
- Our record: South Marcum takes rigs up to 50 ft.
- When is South Marcum open?
- Our record: April through October.
- How do I reserve a site at South Marcum?
- 6 months ahead via Recreation.gov. Book on the operator's own page.
Before you go
Illinois rules for RV renters
Illinois rules
Verified 2026-05-10
- Rental tax
- 7%
- Min driver age
- 21+ · 25+ Class A
- Gravel roads
- Allowed, disclose
- Generator quiet hours
- 22:00-07:00
- Alcohol in cabin
- No open container
- Dump station
- Standard