ATVs are excellent tools for getting around. It's best to use them only on beaches where there is no permanent damage and tracks are washed away by waves. Tundra plants cannot bounce back as easily as gravel.
ATVs or 4-wheelers are handy for getting around the tundra, but they quickly damage the plant cover. Without plants to insulate the permafrost, it melts and makes a muddy quagmire that can't easily be revegetated.