IMO...Hight isn't what gets you busted. The majority of the deer I've taken I have been sitting on the ground. Not in a blind either. Scent control, playing the wind, sitting still (being quiet), and pattern break up are the keys.
I have to agree with the last post,
I hunt from a tree but sometimes I only get 10 feet up, it depends on the cover, terrain, you can put yourself out of the line of sight,
I like to hunt down in valley's in thick stuff, I prefer to find a 3 prong tree with a lot of growth in and around it and then just put my torso above the junk, I'm basically using a tree like a blind,
Too many hunters, shooters, Ect get caught up in numbers, be more flexible don't get hung up on some factor, Look at the complete package, get hid, watch your scent control, watch your silhouette, Its a total package think of it that way