I'll be hunting Idaho this year as well the second half of the season. They're more likely to be bugling then than the first two weeks. Also more wary because they will already have been hunted for a couple of weeks.
Regardless, I don't do much calling. I do a lot of still hunting. If a bull calls, I try to sneak in on him. I'll sit wallows occasionally, and have had a few close calls, but have never had a shot at an elk at a wallow. Have more luck moving, probably because that's what I do 80% of the time.
Where I'm hunting this year, they come out to feed in the sage on the top third of the mountains just before dusk, and they may still be out there at first light. After that, they work down into the very steep, thick draws. Was there the first two weeks of season last year. As the season wore on, they showed themselves feeding less and less. I don't expect to catch them in the open the second two weeks of the season.
Last year, I c aught one feeding in a very isolated bowl about mid morning and let him feed into me. 15 yard shot.
I'm getting stoked just thinking about it.