First and foremost, get in shape. You may luck out, plop down in one spot and kill a bird, but most likely you will need to do some climbing. The birds here have a sick sense of humor, they like to gobble at you to get you to climb from one ridge to the next, then answer back another ridge over. You can do a lot of walking.
Two things to bring, GPS with topo map and a good box call. A box call is my go to weapon for mid day locating. These birds have a lot of country to travel during the day and they can be anywhere. We have a good population of hens lately, so you can strike several birds who gobble and go before you hit that one that is on his own and hot for a companion.
Come prepared for snow no matter what time of the season you come. We have had measurable snow into June here, although rare. But if coming in April you may be greeted with knee deep snow.
Study up early. When you decide an area to hunt, use Google earth and a topo program to search out likely looking spots. Most areas are accesible on a Forest Service road, but many are closed to motorized travel Dec 15 to May 15. They do make for easy walking and locating birds.