G'day,
Check your ABP for maximum laod and remember that driver and passengers are load.
Try to distribute the load so that the boat doesn't change attitude (i.e. side to side, fore to aft) than when empty. That should maintain neutral trim.
If you have trim tabs and usually trim down the nose you might to put a bit more weight forward.
Do not overload under any circumstances.
Regards,
White Pointer