Nice little free campground
Nice place in between Denali state park and Denali national park. There are toilets and trash cans only. Although, it is infested by mosquitoes and not very well maintained but clean. There are about 10 RV sites, and a few tent sites. You'll have to make your own path to the river, grass is high. Watch out for bears.
Site#6
Month of VisitJuly