There is a permit system for Half Dome in Yosemite that expanded after we climbed it, and one for Machu Picchu that came in after we hiked the Inca Trail. The W

There is a permit system for Half Dome in Yosemite that expanded after we climbed it, and one for Machu Picchu that came in after we hiked the Inca Trail. The Wave has had an infamously brutal one for a while, and I think Buckskin Gulch has a limit for overnighting. So it's already done in a few places. It can be frustrating though - I've tried for The Wave a few times and never been successful. Their limit seems low. One thing worth doing is a shuttle system. Zion has one for peak months and as well as removing cars from the main canyon, you then have a captive audience which you can reach with messages about best practice in the wilderness though people ignore everything and feed animals anyway. Bryce has a shuttle too. Wouldn't surprise me if Arches was already planning one. That at least helps with the need for more and more parking.