They are so many variables that can play into it. It's already been said that elk are where you find them. To add to that, just when you think you've "figured them out" they'll do something to prove you wrong.
I take 2 approaches, and neither bring any different results. It boils down to how you want to hunt. 1) Break every variable down to a granular level. Analyze all the factors that can play into it. Study, scout, study, scout, and when the time comes they are there or not. 2) Pick a spot, hunt it effectively, and see where the day leads you. If there's elk, great! If not, rinse and repeat the next day.