Is there a mod out there to add a new pack animal to the game with a meganormous carrying capacity?
My caravans to move supplies between settlements regularly comprise hundreds of animals. It gets tedious managing them all. I'd like to trade in 100 Muffalos for a single "Muffawhale" capable of carrying the same aggregate weight.
Have you looked into the Dinosauria or Megafauna mods, they add larger creatures that with some help can be pack animals.
The Bronto has a high carry weight.