Among those discussions, what's interesting to me is that Stephen Mather [1], the first director of the National Park Service and before that a de facto lobbyist within the Wilson administration for national parks, saw little tension between promoting park tourism and better preserving parks from abuse. In fact, his consistent position was that making parks more fun and accessible for ordinary people would in fact lead to more parks and better-protected parks, because awed park visitors would themselves become lobbyists for parks. He actually broke with his friend and former employee Robert Sterling Yard (the ex-PR man for parks mentioned in this piece) precisely on this point - Yard didn't believe that more park visitors were the unalloyed good that Mather was sure they were.
On balance, I do think that Mather was more right than Yard. But for at least about 50 years there has been a realization that the downsides of park tourism are far bigger than Mather would have envisioned.