Time to Sac up!

I need to get some more weight in the boat. I just bought a wake surfer and i cant quite get the board to keep up with the boat.

WHat sacks do i get?
WHat pump do i get?
Do i get multiple smaller sacks?

What are my alternatives, and how do i configure the weight in the boat?

the big bump "750s" are on ebay for like $55. get a tsunami pump. for surfing, you need a lot of weight in the corner and a little in the nose. takes some experimenting....