I do both but I mostly set. Mainly because I feel like I move much less when I am setting. I have been surprised several times but I have always able to stand up and shoot without being detected. You can stand up with deer looking in your direction as long as you do it slowly and in a fluent motion. It's the quick movements that alarm them and allow them to see you. I shoot sitting sitting sometimes also depending on the circumstances. Sitting for me is just more comfortable. I stand up and get the blood circulating every once in a while for 10-30 minutes and then I normally set again for and hour to two hours.