Anyone stating "facts" about elk behavior is suffering from the Dunning-Kruger effect.
Facts about elk: They eat about 20 lbs every day so you can bet they have a food source somewhere. And they aren’t camels so they’re getting water somewhere too, although that can be hard to find.
They are nothing like deer, so don’t bother tiptoeing around. Cover ground without worrying about snapping every twig until you see sign or smell them.
Forget the north slope thing. Elk definitely on north slopes. They also bed on south and west slopes. Think about it, that’s where the feed is. As long as they can get out of the sun in a spot with some cover and escape routes, they can be on any side of a mountain. North slopes can be super thick…. which is why elk do hide there, but it’s also harder to kill them in that thick stuff. It’s more user friendly on south slopes where there tends to be some more open timber or parks and meadows.
Like any game animal elk react to pressure. So while you can definitely find elk within a half mile of roads (for sure!) once things heat up your Plan B should include somewhere that is hard to get to. Somewhere with an obstacle between you and most other people things like a big elevation game on a steep slope. Crossing our river. You could put on a bunch of miles but that won’t do you much good until you get off of the main trails and do the same thing by putting some geographic barrier between you and the rest of the pressure.
Everyone knows that whitetail deer have super sharp instincts. But I also consider them to be pretty smart. Masters of hiding and vanishing. They get a lot of exposure with humans and hunters so they spend their whole lives learning how to make it through hunting season. Or they don’t live very long. Elk have their animal instincts, but they’re not nearly as smart or spooky as whitetails. You might know that a white tail deer is living within one square mile, but barely see him and never kill him. Finding elk is the challenge. Once you find them hunting them isn’t nearly as difficult. BUT… they are nomadic. Once you find them, you have to make something happen because within a day or three they may move on naturally.
To answer your question, there is no magic number when it comes to elevation. The areas I hunt in Wyoming top out at 9000 feet. The stuff in the area that’s over 10,000 isn’t the best elk hunting. In Colorado it’s common to hunt from 10,000 feet up to 11,500 or more. I don’t worry about the numbers. Look at the lay of the land. Every mountain has a top a bottom and benches in between. Those benches will most likely have travel routes that lead to and from bedding and feeding areas. Those benches are bedding areas.
Try hiking in on a trail that starts down low such as in a river bottom and goes to the top of a high ridge or to a peak. Along the way look over every elk trail that crosses the forest service trail and drop way points at them. Look them over and see which have sign. You might not see much sign because they are on the move when they cross through bottoms and over tops. You might have to walk the trail a little bit in one direction or another. Lots of times track are easy to spot because elk follow the foot trail here and there.
Also look at your map. If you were on a trail and there’s a steep ridge to one or both sides and you see an elk trail crossing look at the map and see where it’s heading. There’s a good chance you might see a low spot or saddle in one of the ridges on either side of the trail. Or on both sides. (hell yeah!) Good chance that game trail comes through those saddles. Hike all the way to the top of the main trail. While you are up there spend every minute looking around for sign and getting to know the area a little bit. Maybe peek over the top if you see a good reason too. Plan B could be on the other side of the top. The next day, your plan should be to determine what elevation you saw the sign at, take the forest service trail to that elevation and leave the trail behind.
Follow those benches as far as you can and you will learn a lot. How’s that for an answer? Good luck!