hey camp freddie:
You are quite right, there are certain limits concerning cloud ceiling/base for IFR flying even if all your approaches are precision approaches. Destination or Takeoff-Alternate limits do not require any cloud ceiling. However Destination-Alternates do, normally a cloud ceiling of Decision Height + 200ft and RVR + 400m. So for departing or returning to Aberdeen OVC001 is not really an issue if you can find a suitable Alternates.
Regards,
Woolf