Once its nice and lined up, pause the recording, detach the trailer and move it out of the way, get back to your paused location, unpause, activate the reversing maneuver option and back into the bunker until you kiss the backwall, undo the reversing maneuver option, drive out of the bunker and pause+ reattach your trailer and finish the loop by ending it a little bit into the field. Start at the first point where the combine/forager begins its course and face the road, drive carefully towards home with your trailer attached, swing out in front of the bunker to line up the trailer down the midline of the bunker and drive forward so the trailer is relatively straight. to stop after emptying its load and remain in the bunker. to back up too far into the chaff pile and get stuck. Small imperfections caused it to dump silage at the entrance. Ive got it to automatically unload on loneoak’s home bunker but it’s finicky as helllll. Works better with a forager having a long auger (like jaguar with long/very long option), as for the headrows the tractor will follow the forager, with big trailers it can have problems reaching it. You may have to babysit it a bit for the headrows but after this it works like a charm, i used two tractors + trailers for 1 jaguar forager on field 32 (the large square one on lone oak near the farm). You just have to go to the tractor, stop the course, unload it manually, and restart the course 'at nearest point'. Assign the tractor to the forager, start the forager course, and the tractor will follow it, go to the bunker, and wait at the point. With your tractor, make a course going from the field to the bunker, set a waiting point (the 'park' symbol on the interface) and go back to the field.

Set a course for the forager, with 2 headrows and with a 'circular' pattern so the forager doesn't have to back up. I harvested more than 1.5M liters of chaff this weekend using courseplay.

Farming simulator 14 chaff