Did you actually see him or just hear a deer snort? Doe will snort too. I've been busted many times getting out of my stand at dark. And normally a smart old doe will not come past my stand if she caught me in it. She will give it a wide berth. You may want to cut some of those cedar boughs and make youself a ground blind downwind from your stand. Also change your pattern. If you arent doing it now, try hunting in the middle of the day. I set a camera out last year after not seeing any deer for a few days. They had me patterned! I'd get in my stand before light and sit until about 9:30 or 10:00 and go home then come back about 3 or so. The camera showed the deer had been coming by my stand between noon and 2! Two days later at 1:15 I arrowed a nice 8 pt.