4"-6" shad wont be a problem for larger bass say 4-5 lbs. Depending on what your goals are you may want to hold back on the gizzards. I am assuming you have a bait tank. Depending on how far you have to travel and how big of a tank, you can crowd your tank. I have a 50 gallon tank and last yr would haul 500 at a time. I run oxygen and only transport about an 1.5 hours.