I'm a bit late to the party, but I noticed your comment about rest days earlier. They're a great idea and give you the option of recharging your batteries, doing chores or exploring the area. My rest day near Keld turned out to be the first gloriously clear, hot day of the trip, so off I scampered to Tan Hill for a shorter hike and a nice cold beverage. ;-)
I hope you get the chance to eat at the Mango Tree in Kirkby Stephen. Delicious!