Nearly all of my hiking is done in Virginia. Looking at the topo maps for the AT in Virginia, and the AT in Maine, it appears to show the Virginia areas having more elevation changes. I can easily cover 20 mile days in Virginia. For those who have been through the 100 mile wilderness, what makes it so "slow going" that they advise 10 days of food? The 10 day supply suggests 10 mile days. Thanks in advance.