I've just considered a possible exploit with the fishing skill. When you stock a pond, the fish are never active but what if you mixed them with a spawner spot? Would the fish be active when the spawner fish are, or would there be no difference in the activity of the stocked fish?
I will experiment with this soon! Please could somebody else also test this, so I can compare it with my results. If this works, then the SV lot by the waterfall may just become a piece of prime real estate property!