I never go higher than 20 feet ( I hate heights) and most of the time I' m more like 15 ft. My opinion is take advantage of your camo and the canopy. Hide in them and breakup your outline, that' s what works. Scent control is also important, but I have not used the Scentblocker suits, yet. I usually hunt in or near the piney woods so I break few green pine branches and I have an instant cover scent. It works, even in the hot, humid and balmy early Georgia fall!!!