Long Bed or Short Bed?

Either will work fine for pulling a 5th wheel. I have pulled with both. The main thing for me is the extra cargo space of the long bed. You only get a couple feet but it seems like it is twice the size when you load your gear. I would also say the ride is a little better in the long bed. I like the fact that sense I also generally have a truck camper the long bed definitely opened up many more options.
JMHO