Can't really say as I'm about as clueless in cars and trucks as a guy can get
but I will say you wouldn't dream of not having 4 wheel drive around here in a truck - much less if you were pulling something.
We also have considerably different terrain from you people back east though
. (heck, many times 4 wheel drive and chained up all the way around ain't going to be enough to move your truck, much less being hooked onto anything)