Maybe I should have given a little more detail on the directions. The main tree row runs NE and on the north end there's a large patch of trees that runs east to west. My plan is to set up on the patch that runs east and west, about 30 yards east from the long tree row. This would put me about 80 yards east of the south entrance to the trees.
One of the reasons I planned the spot I did was because I have to access the area from the north, so to get through to the south end I'd have to cross a slough and the entire shelter belt. Also, to the south of the shelter belt is pasture that is well grazed and the deer funnel in on several trails from different directions. The south end would be a good pinch point, but I was worried about still being up wind of deer coming from the SE.
I know being up wind is a risk but with a west wind I'd be in good shape, NW wind would be pretty safe depending on the exact wind direction that day, a straight north wind might be questionable. A NE wind would be the only time I'd really have to worry about scent going directly in the direction of where i expect the deer to be.
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Also, that's good advice on the light from the heater. I never thought of that. Maybe I can find a way to hide the light.