Where does one attain Into The Woods?
You don't have to do ALL of them to get the level 50 quest. I didn't complete all of them. Just the main quest line.
By main quest line, I mean the main line of Cold Harbour. You also have to do your main personal story quests. You don't have to do all the side quests or anything. In fact, you can't complete them all because I know of at least one that is bugged to prevent completion, the ship one, that is.