National Park Service · Iowa campground guide
The numbers
Fee range
Free
Season open
Year-round (day-use only — no overnight in NM proper)
RV size limit
Tent-only
Reservation window
Backcountry permits not issued — use Yellow River SF
The insider read
Effigy Mounds NM itself is day-use only. The Marching Bear Group of 31 mounds (10 in bear shape) is the highlight hike. For overnight, camp at adjacent Yellow River State Forest 5 minutes south.
Original analysis from PickRV — synthesised from public sources you can verify, pulling the operational details competitor guides typically skip.
Verify at nps.govOn site
Book it right
PickRV doesn't handle campground bookings — reserve direct through the official channel so policies and cancellations flow through one record.
Opens nps.gov
Every fact above is sourced from the managing agency's canonical page. Cross-check fee, season, and size limit before you depend on them.
Match the campground's size limit and hookup level to a vehicle category, then plan the rest of the trip.
Keep exploring
Near Maquoketa
StateInsider tip · 13 caves accessible — Dancehall Cave is walk-in. White-Nose Syndrome decontamination required at trailhead (free clean-shoe protocol). Bring a headlamp; the deepest caves are unlit.
Near Dundee
StateInsider tip · Iowa's first state park (1920). The Devil's Backbone ridge is the photo geology. Trout-stream stocking weekly April-Oct on the Maquoketa River — fly anglers cluster the campground.
Near Madrid
StateInsider tip · Sandstone canyon walls 100 ft above Des Moines River. The 'Crow's Nest' overlook is the photo spot. Floods close the valley road periodically — call ahead in spring.
Near North Liberty
COEInsider tip · USACE camp 15 min from Iowa City (University of Iowa). The 1993 Devonian fossil gorge exposed by the flood — walking trail along the spillway shows 375-million-year-old fish fossils.
Your next step
Marching Bear Group Backcountry (Effigy Mounds NM) is tent-only, so the rig question here is what you sleep in on the nights either side of it — most Iowa loops that include this stop are driven in a rented motorhome.
Nothing in Iowa is bookable today. Dated requests are what we take to owners, so give us the window you actually want — you get one email the day a rig covers it, and nothing else.
Nearby & related
Sourced costs, campground directories, and the places worth a detour — the next layer of Iowa trip planning.
Before you go
Iowa rules
Verified 2026-05-10
