[gonzo41]

There's another alternative. Those attractions will get cut off from casual visits. I watched a documentary on Yellowstone where it explained most people don't go more than 5 miles from the roads at most, and most of the park is largely untouched. You'll just end up with parks where the very coolest attractions take a lot more effort to get to and consequently, the foolish people who do silly things will either not go, because it requires planning, or perish along the way because nature doesn't suffer fools.