Back in the 50’s and 60’s pickups did most of the hauling to the elevators.
In the 70’s pickups pulled wagons to the elevators.
One neighbor would keep a partial load of corn in the bed for weight.
He did not unload it each trip.
A different neighbor had a hydraulic lift under the pickup bed.
A little easier to dump every time.
Of course, all elevators had a hoist to lift the pickups to assist in dumping.
And terminal elevators had a hoist to dump flatbed semis.