? Would it be better to hang a climber beforehand
No way - it just doesn' t make sense.
The beauty of a climber is the options it gives you to hunt many trees that are ready - hanging it on the base of one defeats this.
And I don' t see how hanging it 3 feet of the ground will get the deer used to it being 18 ft off the ground with you in it.
And why hang it right at deer nose level - so they are sure to pick up on any scent left on it.
Bring it in and take it out