Of course every situation requires some thought and weights vary a great deal depending on circumstances. The system is complex and how the parts of the system interact is impossible to predict. No two trips are the same, even on the same trail. You can not predict how you will feel, the weather, or how much of your lunch the squirrels will eat. But it is fun to look at approximations and consider where you might stand in the broad scope of things. From this small sample I'm thinking those who contributed are certainly in the lowest 10% or so. See my graph attached.