Good luck in your search. Have you hunted in or visited Wyoming? 80 acres with water (I assume you mean surface water such as a pond or stream) and big game animals is likely to be priced significantly above your $100K. Five years ago, I paid more than that for the 25 acres adjoining my property on the prairie in SE Wyoming. No water, the occasional antelope and mule deer.
Ideally, you could find land adjacent to public access hunting - BLM or Forest Service. Again, be prepared for sticker shock. There are real estate agencies that specialize in recreational properties. Try a Google Search.
A couple of years ago, my wife and I looked at retirement properties in Wyoming, Idaho, Oregon, and Montana. We wanted frontage on a trout stream or at least close and easy access to trout water. We found we could not sell our current holdings - 50 acres, 15 year old 2500 sq ft house - for enough to purchase a small cabin or in some cases even property. We elected to stay where we are and spend some money on travel and fishing float trips.
Don't mean to rain on your parade. You may find exactly what you're looking for in your price range. Understand that pronghorns are primarily prairie animals while elk for the most part are mountain/forest critters. Of course there are exceptions. Also beware that there are real estate agents of questionable ethics who promise "Your own 40-acre ranch in Wonderful Wyoming." What they don't say is that there is no water, no utilities, and sometimes questionable access. And these "ranches" are often located in places like the Red Desert, appropriately named.
Again, I don't intend to discourage you. Just be very careful as you evaluate properties.
