Kettle Moraine State Forest extends across eastern Wisconsin, covering over 30,000 acres of glacial terrain that includes distinctive kettles and moraines formed during the last ice age. For the best tent camping near Maribel, Wisconsin, visitors often travel to the Northern Unit of the forest where group camping opportunities provide spacious accommodations for multiple tents. The area experiences cold winters with heavy snowfall and moderate summers with temperatures typically ranging between 60-80°F during the main camping season.
What to do
Hiking opportunities: The Ice Age National Scenic Trail runs through Greenbush Group Campground, offering direct access to miles of hiking paths. The trail system showcases the region's unique glacial topography with several loop options ranging from 1-5 miles in length.
Mountain biking: Several dedicated biking trails are accessible within a short drive from camp. The trails vary in difficulty level, with both beginner-friendly paths and technical sections for experienced riders.
Stargazing: The relative distance from major urban centers creates opportunities for night sky viewing. The grassy open areas within the campgrounds provide clear viewing platforms during summer months when skies are typically clearest.
What campers like
Spacious sites: The camping areas accommodate large groups comfortably. "Large sites great for groups. Sites 2 and 9 are the largest. Those can each fit over 20 backpacking tents at the same time," notes Amber R. about Northern Unit Greenbush Group Camp.
Accessibility: The proximity to Milwaukee makes these sites convenient for weekend trips. "We booked this for a coronavirus-safe camping trip, and it did not disappoint," reports Hilary S., highlighting the reasonable travel time from urban centers.
Natural setting: The combination of grassy sites and surrounding forests creates an appealing tent camping environment. The abundance of trees provides natural shade during summer months and supports hammock camping as an alternative to ground tents.
What you should know
Water access: Water sources may be centralized rather than at individual sites. According to Hilary S., "Water is usually available, but more limited during the pandemic (spigot turned off by our campsite, but available near the parking lot at the entrance - a longer walk)."
Noise considerations: Sound travels between sites despite visual separation. One camper noted they "could hear loud music from the site 4 late into the night" despite the sites appearing separate.
Reservation requirements: All group sites require advance booking, particularly important during summer weekends and holiday periods when sites fill quickly. The reservation window typically opens 11 months in advance.
Tips for camping with families
Site selection: When camping with children, choose sites closer to restroom facilities to minimize nighttime walks. Sites near the center of the loop typically offer the most convenient access to toilet facilities.
Activity planning: Bring field guides for local plant and animal identification. The glacial landscape contains numerous educational opportunities about Wisconsin's geological history.
Weather preparation: Pack additional layers even in summer, as the area can experience significant temperature drops at night, with variations of 20-30°F between daytime and nighttime readings common in the region.
Tips from RVers
Limited accommodation: Most camping areas in the Northern Unit are designated specifically for tent camping without RV hookups or suitable parking. RVs should look to other sections of Kettle Moraine State Forest with appropriate facilities.
Alternative options: For those requiring RV access, several private campgrounds within 20 miles of Maribel offer full hookups and pull-through sites, though these lack the forest immersion of the tent-only areas.
Day-use option: RVers staying elsewhere can purchase day passes to access the recreation areas, trails, and picnic facilities without needing to camp in the tent-only sections.
Legend
