I have often sat down and waited for deer to appear in likely spots, but I have never been successful. I have even waited up to a couple of hours. But normally if nothing has appeared after about an hour I move to somewhere else.
Piece of ground I am now stalking has a lot of leaf litter and thus its noisy, and noisy even just to move into position. Am I giving it long enough? How long do those who regularly use high seats etc allow, and indeed if you sitting up till last light do you go into the seat 30 minutes before or two or three hours before?