License............don't need a license to hunt predators in WY
Almost half of WY is government land, no need to know any one with land. Get a Wyoming Atlas/Gazzetter from any of the big mail order places. It will show you all the state, BLM, and NF land. If you need more detail get NF or BLM maps from thier offices in the area your hunting.
If you want to hunt private just go door knocking and you'll have a good chance finding more places to hunt.