I like to run with a lot of ballast. Usually I fill the port and center stock ballast tanks. Then we put one 750 in the rear port locker, another 750 on the seat right in front of it (rear port corner) plus three 375 bags and one fat buddy, which weighs around 150. We use one 375 bag on the floor to help keep the 750 from rolling off the seat, another in front of it on the observer seat (or in the cooler area) and one along the bow port side. The fat buddy is great as you can move it around to tweak. The rear locker 750 is hard to fill up completely, we usually leave it around 3/4 full.
When my goofy friends ride, we leave out one of the 375 bags and go with the same setup, reversed.
The above setup puts up a huge wave when you have 3-5 people in the boat. With more people subtract ballast.
Mark - please post any pictures or video when you get it dialed! Here is a video of me riding behind my boat - one of my buddies hiked out the side for a bit: http://www.youtube.com/watch?v=MIL_2pONqHM