When trying to locate crappie from the bank when should I or how often should I change depth, colors and different types of plastics until I find a group of fish? Example: fishing 3' deep with bobby garland baby shad in chartreuse for lets say 10 casts and no bites, should I change depths, color or lets say switch to a curly tail etc or just up and move locations. Just trying to find the fastest way to get on fish from the bank. Thanks in advance!