I'm no expert but it would seem to me to be prudent to stock the large BG a season or so before adding LMB to make sure they had enough BG of the right size to eat.
Absolutely! That's why I stocked BG last year, including sizes that were ready to spawn immediately. The plan was to wait a year to stock LMB, which I think is still the plan.
I didn't plan for GSF and BH to be so abundant.
I'm not going to make a specific recommendation because I just don't have the experience. But I will say that I fed my BG in my main pond, stocked them early March then the LMB that fall. My BG took off and did so well they actually prevented my LMB from spawning or at least none of the LMB fry survived. So I have had to grow out some additional LMB in an adjacent sediment pond up to a size my existing LMB would not eat and supplement my LMB stocking.
The point is, at least in my case, there is such a thing as the BG doing so well in their spawn that they can overwhelm the LMB and prevent successful LMB spawns. I think my situation is the exception rather than the norm, but such things can happen.
