One source of creaks is sidebars in corner castings. That can transmit sound and maybe ... just maybe down into the hull? We suggest beveling the ends of sidebars and lubricating them. This is a bigger issue with french made corner castings for some reason. Harder anodize maybe. But as Matt Bounds says... if it's broken fix it before sailing. Even a short distance out in the water can cause big issues if the hull fails. Not worth it.