One wonders how long it will take for land management agencies to adapt.
In my estimation, the first thing that will need to happen is that a significant number of cherished places will have to be largely damaged or destroyed. This may prompt enough public outcry (we can hope) where politicians will be forced to support the additional funding that agencies will need to manage the visitation. Use/entrance fees will likely be an intermediate step and will be introduced where they currently do not exist and increased where they do.
And for many places, it will be too late anyway. I just don't realistically see an alternative which provides a positive outcome.
Mora is far from the only one to witness worrying changes in national and state parks. Many of these spaces, supposed to be untouched swaths of time-proof wilderness, have been overrun by first-time visitors seeking refuge from quarantine, joblessness, or the inability to take far-flung vacations. And as people have flooded into the parks, new crises have arisen for rangers and nearby communities
rangers ... said they have all seen increases in visitation following COVID-19, particularly from first-timers. RV and camper sales have surged; so have campground reservations across the country. With travelers still leery of airplanes, and most indoor entertainment options closed, many families seem to be embracing a relatively cheap getaway option where the risk of catching the virus is much lower than it is indoors.
https://time.com/5869788/national-parks-covid-19/At Arizona lakes, visitors have left behind dirty diapers, shoes, broken glass and entire grills