The one thing folks forget in training for LONG DISTANCE HIKING is the arms. Maybe not critical doing short hikes 5-8 miles. But when you crank out 12 plus miles a day you cannot account for the amount of work your arms do. I learned this doing training for endurance running. Believe it or not your arms get tired and I have actually had cramping in my forearms after a long run of 20 miles.
Secondly follow up hydration and supplimental recovery drinks are great. Believe it or not chocolate milk may be the perfect recovery drink mixing the 4 to 1 carb to protein formula. Look it up, it is the real deal and considerable cheaper than store bougt drinks.