Just remember whatever fish are upstream of your pond will at some point end up IN your pond.
Truer words were never spoken. Given this, and plans for 8 acres of YP/WE below, I wouldn't consider the addition of BG, unless there is no even remote possibility of overflow of one watershed to the other. I love the idea of YP and WE at our latitude, and they can do well. If you can raise up a good reproducing population of YP now to go into the big pond later, you'll be way ahead of the curve.
