Have you ever tried ice fishing for your YP? You might have to drag your jon boat out on the ice if it is not thick enough for you to fish safely in Misery?

Have your tried getting your worms down to the bottom in deeper water when fishing during warmer weather? That might get you into territory with more YP and fewer BG.

Finally, have you tried fishing for YP during the first BG spawn. That might be your best chance of having the fish separated as much as possible in your pond.