I stocked 150 YP and 150 BG last April in my 1/2 acre pond and so far have had excellent results. With only a small amount of supplemental feeding by hand my BG went from 3-5" to 6-8" the first year, and my YP went from 3-6" to 7-9". I had two BG spawns I believe and no YP spawn, they were too young.
I added 6 LMB last fall from a friends pond just to have something to watch (they look cool patrolling the shores) and plan on adding a dozen small 3-4" LMB this spring.
Once the LMB get over 16" I will probably have to restock a few YP every year if I want to keep them, we will see.