My hanger is two 15ft ladders high, minus a foot, my 3 ladder stands are built at 15. My climber I will go between 25 and 35. I do have a walnut tree with a platform at 15 and 25 in the same tree.

But then again I do stay on the ground on days in a blind, like the last week, so the answer would be between 0 and as high as I can climb on my climber.

I think the chances of scent awareness are more if you arent at least 15 or 20, but Im no scaredy cat when it comes to heights!