this is what I have figured out. it takes time. you can't leave work at 3:30 and jump in a stand. it took 6 days last year and 7 this year. that is consecutive days sleeping in the cab of my truck. the entire time nothing goes right. the wind is wrong, or my clear route is full of crap that is both slow going and loud. I am very sure I am failing. then, it finally goes right. both times the wind was constant and strong in my face 8-10 mph. I had very quick and almost silent access to my position. both times I got into their space and they had no warning. both times the deer was on the ground very early in the sit. it was also the only time I hunted those spots. I think the chances of success drop rapidly the longer you sit, and hunting a spot twice without several days break is a recipe for a pleasant day watching squirrels.