Sounds like a nightmare one of dad's cousins had one year during rock-picking. Found a large rock, couldn't budge it with the rock picker, got the backhoe, and dug the length of the field before we found the edge.
We had a picker with a digger on front and a basket behind it, didn't work real well for anything but boulders, so we hand-filled it. Then we started using the backhoe and skid-loaders.
The only time I miss rocks is when it rains and I drove the Dodge to work (2wd, Cummins).