Greg....

I'll shoot some from atop my building before the season starts. With the gradation in my field behind the house.....I can reconstruct treestand height pretty easily.

In all honesty, though......I find VERY little difference in POI from ground to tree.

I don't go full bore on the hunting gear to start out practice.....because as our temps get cooler here......I layer up. So what I'll be wearing opening day is FAR from what I'll be shooting in in December. I just go up on the roof about once every 2 weeks during the season.

It's great practice, though....and the No. 1 bit of advice I'd give is.....If you're gonna wear a mask and gloves (to hunt).....practice with them on before going afield. It almost cost me a deer, once......my first.