Thanks everyone for your constructive criticism,
suggestions and, in some cases, snarky yet ignorant babble. :)
I've decided to cover the entire undeveloped area with mulch.
That way, my friends will see that any further contributions
will be immediately visible. Hopefully that will be sufficient
deterrent. I can temporarily shop vac up a spot of mulch
and continue to use my post-hole digger to lift the clay
into a nearby bucket until the hole drains itself.
Deposit mulch in hole to surface, rinse, lather, repeat.
At some point in the distant future, I'll rent a tiller and
combine all the goodness.