There's really no cookie-cutter approach to things It depends on where you're hunting. The West has a variety of hunting conditions.
Not knowing where you want to hunt makes it difficult to assess what you're asking. But...
Some areas have more vegetation than others, thus range situations can vary from short to long. Real hunters try to get as close as possible for an ethical shot vs. the TV hunting shows that shoot animals at very long ranges with all sorts of shooting aids, mostly conducted on private game ranches, vs. public lands, under perfect conditions.
Also, whatever cartridge your using has it's own effective range which one should be aware of, as well as a proper bullet that provides the performance needed for elk.
Add in trajectory changes at higher elevations, than where your range is at, terrain features with swirling winds, and shooting adjustments for up/down angles shots.
I'd suggest if you can put shots into a reasonable tight group at 600 yds. during high-cross wind/bad weather conditions at your range you should be OK.
I've seen out-of-staters taking crazy shots at long-range in high wind conditions at the poor animals & likely wounded some. I can say ALOT about those types but forum rules restricts the use of certain language.
My .02
PS: If you're using a guiding service they should be able to get you to an ethical shooting position. If not, get as close as you can and don't take wild shots.