You should be able to weight it down without too much trouble. I would not use an Enzo style sac if you want both an awesome surf wake and wakeboard wake. I have found that the weight distribution from the "L" shaped sacs tend to give the wakeboard wake a weird shape.
I would use the 1100lb Fly High Jumbo Sacs in the rear compartments. Fill one side when surfing but when wakeboarding you probably won't fill the rear bags all of the way to have a more equal weight distribution.
Place a 750lb Fly High Fat Sac in the walk way when wakeboarding and on the seats for wakesurfing.
Finally add some bow weight with either the 650lb Fly High Integrated Bow Sac or the 1000lb Fly High Triangle Bow Sac. When surfing you will only need about 300 to 500 lbs. up front. When wakeboarding fill it up to achieve your desired wake shape.
Here is a little surf wake article I wrote last year about,
How to weight a Supreme 226.