Just now, a few minutes ago, I was near this nest and heard that good loud screep again. I looked over and there was Camper's sister, fleaping crookedly from branch to branch, teetering crazily at each landing, until she reached the very top of her nest tree!
Some of the people who work at the Co-op have been watching her; they confirmed that she has been doing this for a few days but has not yet taken a real flight. Still, it's quite a way up! She looked very proud once she got her balance and settled on the highest point of the tree.