Excellent advice about stalking during daylight. Your absolutely correct about elk changing zip codes when spooked.Been Elk hunting since 1986, I f you are hiking in put your longjohns and heavy coat in your backpack and hike in. Once you get where you are waiting you will cool down and than put your dry warm clothes on. I personally dont head out until shooting light because unlike whitetail deer, If you bump into Elk into the dark they might change drainage's on you . Good Luck and enjoy!