I live in western NC calhoun, and I have a neighbor who set the six inch round posts around an alley he had between fields and he has created a loading chute this way. The alley way is about 150 feet long. He attached cattle panels to the posts and has bull gates arranged about every 20 feet through the 12 ft alley, or a total of six bull gates. He simply moves them into the alley with feed and closes the gate behind them. The natural tendency of the cow to return to where it came from makes them head back towards the closed gate. He then closes the next gate up the chute, basically crowding them in. He then starts working them up the alleyway to a small wooden loading chute built off of the side of the front gate. I have watched him move 50 limousin cows into and out of this system numerous times. He summers them here and moves them to his homeplace in the winter. Not sure if this would fit your operation but he handles this all by his lonesome most times and it seems to work good for him.