Pick a good chunk of National Forest off a map....and go HUNT it. There are places better than others here, but all of it can be good. There are big bulls in every mountain range, but there are Very few taken each year....compared to the number of hunters.
I've hunted all over the state, I hunt hard, usually hiking 3-10 miles from the roads on a daily basis, maybe 10-20 days a season, and I've yet to kill a big bull. I've blown a few chances with bow, but haven't even had a good opp. with rifle. Its not easy, takes some luck and some work.
Good Luck
email me if you want a more specific bit of info...but like I said, I am no big bull master...nowadays, I'm just looking for an ELK!