Update with a lot of new experience: With my heavy, dense, wet and slippery clay, along with the amount and size of rocks buried below the surface and forcing the bucket lip up and over them, I am not doing a very good job of scooping the rocks into the bucket with the tractor. So the rock removal process is now more manual than I had anticipated.
I am using the shanks of the box blade a few inches under the surface to bring the buried rocks to the surface. Then I am manually loading the basketball sized and smaller rocks into the bucket and dumping them. Any larger rocks can be picked up with the rock bucket grapple.
So far I have cleared the trees and stumps for the 16' x 275' driveway. Now I just need to finish picking up the last 10% of the rocks and using the box blade to shape and smooth the clay surface.
If I had less dense soil, I would think a good, heavy, rock rake/landscape rake would be very helpful. Also a backhoe for removing the tree stumps > than 8" or so diameter . I created several 8' - 12' diameter x 4' to 5' deep holes getting some stumps out. In the heavy, wet clay, with tires continually slipping and with all of the larger buried rocks surrounding the tree stumps, each hole this size took me 3 - 4 hours to complete with the CID stump bucket. I have come to the conclusion I will remove the smaller, easy to remove stumps and leave the others for a mini-x to remove. I think he should be able to do so in a day @ ~ $1000 maximum.
A few pictures of the driveway area before starting stump and rock removal. This area has been opened up and cleared, but I have no pics yet due to the weather:



