We found a great campsite for 2 nights off the Smithsonian Butte road where we had neighbours that we could hear occasionally, but not see. Keep in mind that camping is not allowed within 1/2 mile of the main road, and that ( 6 years ago) the road up from Rockville had a section that was moderately steep and rough. No problem in our Tacoma, however we encountered an abandoned sedan stranded off to the side on that section.