Ahh, true. Well sort of anyway, ever try sharpening those serrations on a flat benchstone? Wouldn't think it was that easy then I bet! I mainly use a Sharpmaker to shapren my knives, and from what I understand it makes easy quick work of serrations (I don't own any serrated knives so I wouldn't know). If I were to be going out hiking or camping I would probably choose to carry something like a DMT folding diamond stone. Small, light and no worries about it breaking if dropped or knocked around.
As for serrations on the back, I have heard that a poorly made and designed saw bakc can weaken the knife, and actually cause it to break if used to chop. I guess serrations wouldn't be that bad in those terms, but sure would be more of a pain than a help in my mind.