Looks good. Lots of work, too. I just finished cleaning out around about a half dozen black walnut trees. With my bush hog on the new JD, I'll be able to keep the area underneath the trees cleaned out now.
On any trees that you're not removing the stumps on, cut them LEVEL with the ground or leave them high enough to find easily. Otherwise, they're a good way to have a tractor wheel climb them and tip the tractor. Even with my little Gravely it would want to climb small stumps and give me a scare.
Ralph