I couldn't resist commenting on the write-ups about a couple of these areas that I am familiar with.
Bodie Hills, CA: "Bodie Hills provides an opportunity to link both ecotourism with cultural tourism providing benefits to the surrounding communities." There are already "several hundred thousand" visitors per year to Bodie. There are at least ten times that number that visit the area each year to ski at Mammoth, fish in nearby lakes and streams, camp and hike in the eastern Sierras, or play at the Mammoth mountain bike park. Whatever benefits making Bodie a NM may have, I doubt it will provide any incremental benefit to the surrounding communities.
San Rafael Swell, UT: "Visitors to the area can find ancient Indian rock art and explore a landscape with geographic features similar to those found on Mars." Really. On Mars. The Swell is a neat area, but probably a lot more like some other areas on the Colorado Plateau than it is like Mars. Have we discovered slot canyons on Mars that were formed by running water?