cwhain,
I have used a few kill poles in weed patches and CRP fields. I made mine from 5/8" re-rod, 4' long. About 4" down from top of the pole, I welded a link from old tire chains. I would drive the pole into the ground, usually leaving 30" or so of the pole sticking up above ground. My five foot snares had those one inch diameter loops on the end. What I would do is run end of cable through chain link, pull it up and over the top of kill pole. Very quick way to attach snare to pole. In soft ground I would weld a wing on bottom of pole to keep it from twisting around and around when coyote tried to wrap up.