I know you'll still need to offer people cell service so they can call 911 in emergencies, but why not block everything else, as an experiment? Put a big sign at all entrances to that park so people know what they're getting into.
And then the big question would be... would taking this step increase park usage, or decrease it? I honestly have no idea, but I'm incredibly curious to find out.
https://medium.com/@the_jennitaur/how-to-do-nothing-57e100f5...
It's better that some next generation folks are out enjoying nature and building up some care and appreciation for it than not, right?
Part of the problem is so many people don't have free time and/or money to do anything more than scroll on their phones. That goes for people with good career jobs with long hours, and those scrolling on the bus as they go from one of their low paid part time jobs to another.