Well if your not a Wyoming resident and your hunting public land, im pretty sure your required to use an outfitter, dont qoute me on it, but im pretty sure its some sort of law.

Also, the forest land in western states is huge, and depends on what your hunting. for instance if your hunting deer in the mountains, you can hunt the same migatory routes as outfitters and never see the outfitters due to the make up of the mountains and the sure size.