Wyoming for me. Longer seasons and same types of country and animals as found in CO. And...not so many people and the majority of the people you do fine aren't usually from somewhere else. Montana would be a close second, but Wyoming has more public land, I think, so more and easier access. AK would be great, but seeing as I'm not independently wealthy, doing as much hunting as I'd like to do up there would be prohibitively expensive.
