Dwight -- thanks for posting those pictures of your pond!
That is exactly what I had envisioned as your pond. Up in the north country, the gravel pit ponds are a FAR superior habitat for fisheries than the classic hill pond (dam up a draw or waterway). We've never had winter dissolved oxygen problems in any of the gravel pits that I manage around Brookings. None of them have needed aerators. Sure can't say that about the hill ponds.
Congratulations on a great piece of property!