I usually hunt between 25-35 feet. I don't like going that high, but because of the terrain and the type of trees present, to be any lower and the deer would pick you off. The highest stand I have this year is about 30 feet to the platform. Even that high I don't feel like I am high enough.
In order to get a better idea of what I am talking about, you can see pictures of one of my stands from last fall below. It is my second highest at 30 feet (the highest is one addition 4-foot ladder section).
http://s514.photobucket.com/albums/t...av_album_album