The Park Service tried it in Yellowstone during the early sixties, with its own riflemen on the range. Hunters and outfitters protested: Why slaughter big game at taxpayer expense? A moratorium stopped that, and "natural regulation" became the Park mantra. Under this regime, elk herds would supposedly achieve their own balance with the environment. Not so, says Dr. Charles Kay, an independent biologist who claims the Northern Range is being stripped bare of vegetation, especially aspen. He says that pressure from hunters and predators must be strong to keep elk herds in check and the land green. Hunt in the Park? Voters won't have it!