I note that the "Discovery" representative suggested that people who "Free-camp" spend less than those staying in Caravan Parks - He didn't suggest that free-campers didn't increase the overall income to the districts.
He espoused that they justify high prices because they offer water parks and jumping pillows, which has been the contention of GN's for years - We don't want or need their Kiddie Playgrounds - Most of us aged GN's would only fill their local hospitals if we attempted the rides and jumping pillows, then they would complain that there was not enough Medical Services in their Districts.