I dunno, I come from the school of thought that camping should be just about free. I mean, a little fee or whatever is fine, but when it starts creeping up towards Super8 prices, there is something wrong. How much can a dumpster and a pit toilet really cost to maintain?
Personally I do not like "campground" camping. Camping with some other party right next to me IS NOT CAMPING, it's sleeping outside with a bunch of other people. I like camping out on BLM land or on national forest land, FAR away from the nearest other human. But, when the wife comes, she requires a real toilet, so I often end up at fee sites. I think a per night fee of $10 or $12 is fair, I think $18 is a little steep. Double that and now you are talking ridiculous.
Bart