Fishing (Reprint) (PREORDER)

In Fishing, you try to catch as many tricks as possible in 8 rounds, as each card you catch counts 1 point. You use your caught cards for the next round. If you did not catch enough tricks to do so, you can fill up your hand of cards with fresh cards from the ocean stack. You win Fishing with the most points, but how many fresh cards do you need to succeed?