Likewise. Trees are the easiest solution. But I'm guessing you don't have that option. Fortunately, all my best hog feed sites are in hardwood creek bottoms and plenty of good heavy braches to hang a pulley and rope from.
Just make sure you hang them high enough to keep to keep the neighbors cows that got out from busting the slinger off to get feeder to dump all the corn, as seen here on my feeder!!!
I almost shot this cow for doing this, glad I didn't though...