I think seining if you remove enough fish will work, even a good size fish trap would work. Also, don't give the BG a huge head start on the smallies that you might do with the LMB. Stock the BG and smallies together or even give the smallies a slight headstart. Depending on the size fingerlings of each you stock. If you do stock the BG before the smallies, consider stocking larger SMB fingerlings than you normally would.