Rex:
I know that YP tend to get eliminated from a LMB/BG/YP pond unless they are periodically restocked. I think it follows that they might also need periodic retocking in a LMB/YP pond; the LMB might also be short on forage without as prolific a spawner as BG present.
On somewhat of an aside, if you could obtain regular BG instead of HBG, LMB would have much better forage and the chance of swimmers being nibbled would be decreased. As you have probably noticed, though, it seems to be hard to obtain regular BG (as opposed to hybrids) commercially in Michigan.
I wonder if SMB would grow as well as LMB on a RES/YP forage base. I am sure you can get several experienced comments here on the catchability and agression of SMB vs. LMB.
Remember that due to the aggression and fecundity of LMB (vs. SMB) and BG (vs. YP), you can almost always easily switch from SMB to LMB or from YP to BG. Not so the reverse.