The best way to move rocks (excluding a bucket on a tractor) is a sled.
Just a piece of 1/8 steel sheet with the curved up front edge. Pulled
by a riding lawnmower. Roll the stones on and roll them off.

Bob
Best thing I ever "invented" was using an old truck hood as a sled. Used it
for transplanting bushes with large dirt balls on them. Just roll them on
and off the hood. Punched two holes in the front of the hood, used a short
piece of chain as a bridle, and pulled it with the truck or tractor. The
front of the hood was turned up (down) so it moved very easily. Hood also
had a ridge down the middle so it tracked straight.
Never did put a patent on it so you are free to use it. :-)