We stayed at Illiniwek for 2 weeks in our 2021 Keystone Hideout 250BH. They have water and electric sites as well as primitive (yet we didn't try or ask if we can camp on primitive with our RV, but there was a smaller motor home on one of the sites). The site was fairly level and had decent space between sites. The water at the sites tastes funky so we opted to buy jugs of water from the store.

The sunsets on the Mississippi were beautiful each evening! 

The campground had firewood for sale and a nice playground for kids. The campground is also right next to a biking trail. There was public and private bathrooms. The private ones were only accessible to campers that received a key from the park office. It was nice that they were private but they weren't kept up that well and had storms of mud-dabbers on the outsides of the building. The insides of the bathrooms were kept very clean. One of the shower stalls in the women's restroom did not work but the other worked just fine with nice water pressure. The showers were stalls with a shower curtain. There were benches and hooks with a small wall blocking it to keep your stuff dry. 

While we were staying here a wind storm came through and knocked down a tree right behind our camper. Luckily it fell away from our camper and there was no damage. As soon as the storm was over they had a tractor come haul the tree away so it wasn't blocking the road anymore. We enjoyed our stay and would stay again. -1 star for the buildings having so many bugs making homes on them.