I've been using the ascending/descending prusik knot for quite a few years now in my hang on stands. My climbers I usually use the attachment strap to the tree. To get the stationary rope in I have used a couple of different methods. One method that I usually use the most is tie some form of weight to one end of the rope and toss the rope over the selected branch. The weight will pull the rope back down to me. I then loop one end around the other to form a choker. Just pull it back tight up to the branch and there you go. The other method is climbing and tying it in for when there are too many branches in the way for a toss. When I do it that way I use a linemans rig to climb with. I also use an anchor eye bolt designed for dirt to tie off the bottom of the rope for the prusik system.