What, would you say, was the closest they got?
I did have a small herd pass at about 20yrds, but I'm not sure if making a noise would have stopped them. Watching a lake wouldn't be the best place with a bow, luckily the heavily used trails are easy to find in the snow. You wouldn't need a tree stand, the terrain is such that you could easily find a rocky knoll overlooking a trail to sit on, and there are no big trees anyways.