The recommended minimum length of anchor line (or rode) used for an overnight stay in good weather conditions is typically based on the "scope," which is the ratio of the length of the anchor line to the depth of the water. A common recommendation for good weather anchoring in most cases is a scope of 5:1 to 7:1. This means that if you're anchoring in 10 feet of water, you would let out between 50 to 70 feet of anchor line. It's important to note that the type of anchor, the type of bottom (sand, mud, rock, etc.), and other conditions can affect the ideal amount of rode to use. Always consult local guidelines and use best practices based on your specific conditions.