I agree with you, Eli, that Huck is like a boy scout. However, he does not have all of a boy scout's characteristics. He definetly isn't clean, but he is sort of reverant. He isn't always trustworthy though, but definently he is smart.
To go through the steps of planning his escape is pretty amazing, escpecially since he came up with the plan. It is funny that he would even kill a pig and sprinkle the blood on the floor to make Pap think he was murdered. He can at least survive.
http://sparrow-hawks.blogspot.com/2009/09/huckleberry-finn.html