As far as nothing to do there well that is fairly subjective. No there are not a bunch of roads that criss cross the park to get you into every nook and cranny of it but that is also part of the good part that if you are willing you can get away from it all there which can mean a hike of mile or two or as was put 40 miles whatever floats your boat.
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With the exception of Old Falls River Rd, which we have been on or 3 times. And the Wild Basin Rd there are no roads into the park.
Large Map 13 MBThe shorter, 5 mile or so round trip hikes don't really take you anywhere interesting. We've done most of them. So you are taking the Edward Abbey line that if you are not capable of a 40 mile round trip backpack, then you should not have access to the park.
Glacier for example is much more friendly to the majority of park visitors. And so is YNP and even Yosemite. You can spend a week cruising the back roads of Big Bend and GSMNP has a road net. Even tho the great majority will never do anything other than drive the main route. But not RMNP where 90% of the park is locked away from the public.