Over the years I've heard (and read) from other touring folks that bikers who roll into a National Park to camp for the night will not be turned away even if the campground is full. I've heard that they will put you somewhere, maybe not the most scenic or convenient place, but at least a place to crash for the night. I guess the motive is that we can't exactly jump back on the bike after a long day and grind out another 30 miles to get to the next campground.
Does anybody know if there is any truth to this? Is it NPS policy, or just a recycled story of a lucky biker crossing paths with a sympathetic ranger?