Thanks guys. I was up there over the weekend and was able to find a school of the adult shiners hanging around a brush pile in about 2 1/2 feet of water. I only saw 1 or 2 initially but I tossed in some chick starter and it started as feeding frenzy. There were dozens of them eating the feed. I think it is a good sign that these fish seem to be in good shape. I am feeling optimistic about spawning but still have thoughts in the back of my mine about that parasite that causes sterilization. We'll see what happens. I am thinking I should see fry in the next couple weeks or so if they spawn successfully.
I wouldn't worry about the parasite. A customer has a 4 acre pond where the GSH have a self-sustaining population. His Hybrid Crappie and HSB are growing VERY well. Last week or 2 weeks ago a 16" Hybrid Crappie that was 3 years old weighed 2.25#. It was stocked as a 3" fish.