After breakfast, Ban and the others rested for a bit and then kept their things before they decided to finally go to the center of the lake where it was rumored to have Pure River Water at the bottom of it. They already agreed before that Yakob and his group would help Ban retrieve the Pure River Water, if there were any on that said location as a trade for the Demon Mushroom body.
Ciera and the other two people who got infected had not fully recovered yet, so they were instead carried by the mounts such as Yakob's Yak who was occupied by Ciera alone, and two other creatures that looked like a dog that were occupied by the other infected people.
As most of the others didn't have a big monster to be used as a mount, they instead shared with the others. Yakob's second monster was strong enough to carry him, but only him alone. Brando's summon was a wolf-like creature but wasn't big enough or strong enough to carry him so he also hitched a ride with the others.