With balance issues, I don't climb any longer, but when I did, I found that 20' was plenty high enough. That was easy since my rope to pull my bow up is 20'. If limbs on nearby trees were a problem then I might go 25'. Anything over that started affecting the angle too much on the shot I would hope to have. I didn't want too steep of an angle.

I've heard people say that they would climb high enough that the wind wasn't a factor. I just argued that if I kept the wind in my face, it was even less of a factor. Besides, I really don't like heights, I just conquered my fear with all the courage I could muster to get that 20' up a tree every time I hunted.