tree stand hunting for elk doesn't normally work. maybe if you had trail cameras set up for a few months in advance you could get a good pattern. early season in the heat they will be up very high so be prepared to climb. i hunted first rifle in colorado last year and they were indeed high even with temps at night in the 20s. it warmed up to the 50s/60s during the day so movement was minimum. be at high elevation before light and glassing while the sun is coming up. normally you will see them up through the aspens in the mornings or tree lines. if you're going in a month, will you be hunting with the bow?