We camped with our in laws and 3 kids this past weekend at St. Croix state Park, we were in the riverview campground on site 36 (no hook ups). Sites were pretty open but small. There were HOARDS OF MOSQUITOS. We used 40% deet spray and fogged our campsite 3x over the 3 days so we could reduce the bites. The paved walking trails were nice. The swimming beach is a couple mile drive but the water was nice and cool. There is a playground but we didn't use it. We fished right off the shore and were catching very small catfish and river chub faster than we could set our reels which was great for the kids! There is kayak and canoe rental on the weekend. The showers and bathrooms were very clean.