I have a pop-up blind similar to a double bull in design(ameristep brickhouse) and was wondering if you think the "black hole" effect of only opening a few windows frightens of alerts deer if they aren't used to seeing the blind? Do deer need time to acclimate to the blind, unlike turkeys? Would it be better to have most of the windows open and just be carefull drawing the bow back? How much do you brush in the blind?