For a comp I would keep all the weight in the rear of the boat. I'm pretty sure the driver and batteries would be enough weight in the bow for ya. Feel free to weight the rear until she doesn't plane out as easily. This will add needed height and steepness to the wake.
For surfing put those sacs all on the portside rear floor and you SHOULD be good to go. Make everyone sit on the port rail.
Lets see a pic!!!!!