I will be partaking in a weeklong pack train procession along one of the historic transalp routes next month. (I'll be leading a donkey btw.. or the donkey me.. we'll see
Would be neat to have an icon for pack train routes, as it certainly is something different. But as well are the requirements different than for hiking trails (not all hiking trails will be pack trainable) and from horse ride trails. Pack trains can probably go routes, that are not possible with "normal" horses.