I'd take an at capacity ship over an anywhere near capacity park any day. At least a ship at capacity is designed to accommodate all safely in virtually all areas and activities are spread out to avoid all at one location alone, and even when they do (like the sail-away party or fireworks) you still can move around and experience in multiple locations. Events in the parks (parades, fireworks or other special activity, early closing, high season opening) concentrate visitors at times IMHO in an unsafe manner.