Wow, I haven't been to Mt. Rushmore in about 15 years, I didn't know there was a Reagan monument, I'll have to get back.
As to the comment from Websfear the first time I saw Rushmore was from a distance, after a few days of backpacking in the Black Elk Wilderness to the south. I'd recomend it, and you'll save the $10 for parking. If you don't want to walk, you'll have to wait for the Obama refundable National Park Parking Tax Credit.
When I think about how much money the ESA has managed to keep out of the American economy I would be more than satisfied if the program was brought to a screeching halt.