The first thing I would do is bugle at them around 4am. Just because they went nocturnal doesn't mean don't call. Locate them in the dark and move in and beat them to the cover they are going to go into. And because it is warm they will have to go to water mid-day. The wallows that they use, may not be the place they go for drinking water. Most of the wallows I will sit on have running water close, that way I can watch both places. I am not using a blind like Elknut1 does. And I don't use a call when sitting on water holes, I just watch. And when something moves in, SO DO I! And in the evening, when I know they are on there feet, I go into the timber and get them. But I never get 10 days in a row to elk hunt. So I am a chance taker, if I smell a chance I take it.
Gselkhunter