A few years ago while touring with friends in Eastern Canada we found a campsite that wanted us to pay $35 PER TENT on a small tent site, which would have been $105 for a night on a small patch of grass with no services. We lied and said we were all sleeping in the same tent, then arranged our tents so my larger tent was partially obscuring my friends', should anyone from the campground office come a-snooping.
After that trip, we have been primarily travelling in rural Eastern Canada where unguarded forest is too easy to find to bother paying for a campsite.