Campgrounds around here are 25-35 dollars a night. But, that is just for electric hook up and occasionally water.
But,, they are CAMPgrounds !! Not camping resorts with all sorts of extras. You get a spot on a lake or river with electric , a fire pit, usually a place to swim or fish, (if your lucky a dock) some hiking trails, a bathroom and shower, sometimes a dump station, sometimes a place to launch a boat, and generally a place to set around the fire with family and a few friends and have fun outdoors.
If you want swimming pools, wi-fi, and stuff like that, then you are not going to get that for 25-35 bucks.