There are several ways to manage for BG in addition to stunted LMB. They include harvest , by fishing , seining , electroshock , food mgt (feeding and fertilizer if needed) and others. You also have to account for natural mortalities of BG which can be a huge variant which impacts your population. In other words your predator is only one factor to reaching your goal. For example you could also use WE , SMB , HSB ,trout and YP. You cant practically add those if you have lots of stunted LMB.

Another issue would be the LMB genetics(adaptation) over long periods of stunting. By doing that you are stocking genetically inferior fish with who knows what other genetic traits. Often long stunted populations are sickly and have other problems. A healthy fishery is your best bet to manage for your goal. Done properly you can get good genetic LMB to overpopulate (it happens all the time with no help) and help control your BG. Plus you have the ability to change course if you want without worrying about poor genetics.