Such a scheme would help save fragile plants and animals, prevent erosion, and give off-roaders a place to frolic.
There are almost no places that specialized earth-ripping vehicles cannot negotiate, and it appears that for their manufacturers (just view their ads), promoters and drivers, no more fun can be had than in tearing up living ecosystems. But these drivers should have a place to ply their activities, however destructive. That’s the American way.
If motorheads want to "enjoy nature" by tearing it up, let them do it in their own backyards.