Depends, for a slightly better wake, put a flyhigh tube sac over the factory tanks in the rear and another in the ski locker. Add some lead in nooks and crannies.
Better than that, remove factory ballast, put 2 gravity games sacs in rear compartment and seat sac in ski locker plus lead in nooks and crannies. This how my 2000 Air is set up and all ballast is hidden. If you want a bigger wake than this, you are going to have sacs on seats or in walkways. I would say my wake is pretty good, but with only a driver, it could be better. Your factory tanks hold 400-450 lbs.