I think if running uni- stay on the hull. If I were racing solo last weekend, I am not sure I would have trapped downwind. I probably would have for a bit (or maybe if I were really behind) until I went over and then I would have stayed on the hull. 2-up I think one definately should go out on the trap if they know how to move around on the trap and stay attached to the boat more or less. The speed difference is huge and, in my experience, sitting on the hull as far back as possible still has the bows digging in and stopping the boat routinely. Need someone on the wire behind the rear beam to keep the bows up. Once that happens then SWEEET! You can fly! and things are actually more stable.