I personally feel you are jumping the gun here - allow your YP, SMB and HSB time to grow, gape will increase, and once those fish get over the proverbially hump in gape allowance you'll see significant impacts on your HBG population and growth/health of your apex predators - they should be pigs.
Agreed. Even with SMB alone [well, almost alone-rare WE], I've been really surprised at how effectively a good population multiple year class SMB can control BG-seeing much less BG recruitment here this year. But it takes a while, years, to get some of those SMB into the 3-4lb range required to take larger BG/HBG.
Remember, too, that your SMB [and HSB to a lesser extent]are going to be working those yoy lepomids all fall and again in the early spring-you'll see a big reduction before next spawning season. If your smallies spawned this year, and do so again next, you'll have a lot more hungry mouths working for you.
I'd be patient, and skip the green carp, unless you really want them. If you can get Rex to come through here, I can send you some bluegill trained smallies to augment your population.........