As mentioned above, and strongly seconded from experience, do NOT add craws until Bass are at least 10" average, maybe even a bit larger.. 5-6 doz FHM will fill a void you can't believe until you witness it.
I haven't heard any numbers of stocking so I'll add my 2 cents.. If you have 4' of water and increasing volume I'd be inclined to stock 50 RES of 3-5" size. Next spring stock 150 more.
If you are 75% full come fall (or greater) start with 20-25 6-8" smb if available, they will likely pull off a spawn next year.
Next fall add another 20-25 smb of the same size. Dropping the number of SMB stocking will increase growth rates and give the forage base a chance at holding a high enough volume to allow the second stocking of SMB to grow rapidly. This should provide a diverse size range of SMB with all having better than average growth rates-depending on how suitable the structure and habitat are.