50'??? What kind of tree and climber allowed you to get that high?
Since I started using a LW climber I go as high as the tree and canopy allow. Having open shooting lanes in the hardwoods seems to be the biggest limiting factor. I try to get to 30' if possible. I've had much better luck not getting scented once to this height. Even if they do pick it up, it's diluted and they can't pin point where it came from. Depends on a lot of factors as others have said.