Which campsite costs $59/night? Looking at Algonquin Provincial Park, a full RV hookup comes out to $53.68/night, the most expensive non-hookup is $47.46/night, and the cheapest one is $42.38/night.
Also, I remember being charged a convenience fee for booking online on top of everything.
Even at these prices I still think a provincial park is the best value for what you get. The park will be your entertainment for a full day, as it most likely has access to water for swimming, or places to hike. Unlike a cheaper private campsite.
Also, I personally had a really crappy experience staying at a private campsite before in Northern Ontario. Got yelled at for starting a fire after 11 pm, and subsequently followed around, including when I went to the bathroom. The campsite was run by mennonites, but it felt like I was on some cult's compound. Cameras everywhere and people walking behind you with walkie talkies.
And it wasn't even that much cheaper and had to pay for showers.
(Prices quoted from https://www.algonquinpark.on.ca/visit/general_park_info/fees...).