Not trying to be mean or anything, but you have said your not an RVer...so you need to look at both sides of the story.
I have an employee who used to own a campground...more than once big Motorhomes came in and the only reason they did was to dump tanks. Now you have to realize....that act flooded his septic system. A system that was designed to take it constantly, not designed to be flooded with a couple hundred gallons at one shot. So, is that fair to the campground owner who is trying to make ends meet also??
I would venture to guess you have never been in business for yourself also....your not thinking of the costs of running a campground. The advertising, mortgage, insurance and maintainance that the campground owner has.....everyone thinks that people who are in business are just over run with cash....NOT. More accurately, we are over run with bills.....
The ONLY reason Wal-Mart lets campers stay overnight is the hope that they come inside and spend money...who knows, they may spend more than a campsite would have been....but look how much money they saved..............
I am sure others here will have a different outlook on the subject, that is my 2 cents....