There definitely would be less opportunity for Elk hunting on public (BLM) land out West (e.g. WY) if ATVs and other motorized vehicles were allow on that land. Elk herds andwhere they feed, bed, etc.are definitely affected by any significant motorized traffic and would be pushed further back into private and wilderness area.
It takes getting off the seat and onto your legs and putting miles betten roads and the mountain ridgelines and benchs where they spend much of their time.