Those 3"-4" crappies will be eating machines. They will most likely decimate your year class of bass for this year. It appears you had a good spawn of crappie from last year. Those 3"-4" crappie are those crappies born last spring. I would get to work on fishing them heavily, seining them, trapping them or what ever other method you can think off to reduce their numbers as much as possible. Also look into providing good cover near your bass spawning beds to help the largemouth fry keep from being eaten... Those crappies will directly compete with bass of the same size range hampering their growth as well. Do you have many bass in the 15" plus size range in your pond? If you do, they may help you thin some of those crappies out.