If you are not sure if you want the sacs. Try people first. Have four or five extra people in the boat, and move them around to see if the wake improves, and if the boat can handle it.
I have a freind who has a Chaparel, and he has a 350 engine. He has plenty of power, so the boat could handle it. To modify the wake start adding weight to the back of the boat. when it is hard to get on a plane, add some to the middle, and see how the wake is. Should be just right.