Congrats on the tag. I've hunted MT several times in the general units so I have some experience. I'm a cyber scouting nut as I live in NC and don't have the luxury of putting boots on the ground for my scouting.
1. First thing I learned is it's way steeper than it looks on aerial photos and even topos. Thus, be in the best shape that you possibly can be.
2. When solo, I will not hunt further than 2 miles from the truck but I'm old. Packing elk quarters is hard-add in blowdown, thick timber, steep slopes and grizzly bears and it can be hell on earth.
3. Stay mobile and hunt from the truck the first few days.
4. When you find elk, slow down. Elk hunting is not a race.
5. Be bear aware. Do not do cold calling setups. Follow USFS rules for food and camp security. I limit traveling in the dark. If you kill an elk, move the meat away from the carcass as soon as possible.
There's much more I could add but I don't want to give away some of my secrets so hit me with a PM and I'll share a bit more.