I've been sorting this out with the Game Warden in Baggs. Elks is right; anything that requires a power source, i.e. spotlight, night vision, illuminated reticle, is illegal on public lands. You can use them on private lands that you have written permission to hunt. In southern Wyoming, this is kind of a crap shoot for getting permission. The Warden also said the walk in areas still require written permission from the land owner to use a spotlight at night; actually, I believe all the ones open to predator hunting say "daylight" hours in the regs. The best thing to do is talk to the Warden in the area you'll be hunting and run your plans by him; if you plan to use only moonlight, there is no prohibition. Also, ask him if you can shoot furbearers at night; the Warden in Baggs gave me a thumbs up, but I'm curious what someone else would say in a different area. You cannot use a spotlight on any lands, private or public, to hunt furbearers.