i think the noise of walking in and climbing into the stand is the biggest part. that will spook the deer more than anything. the best bet is to get in as early as you can even though it sucks(put in the time and it will pay off). most of the time if you get in early enough and quiet enough the deer will just circle back. i use a little green clipon headlamp or a flashlight pointed to the ground with my hand cupped over it. i also try as much as possible to walk like a deer ha ha. take a few steps and stop. but as long as your not shining a bright 200lumen light all over whatever deer you kick up should come back around after things settle.