The entrance to the market was a wide street, enough for six wagons to pass, or four with two rows of them parked near the buildings.
That was where Karl stopped Thor, at the edge of the market, in a quieter section close to a small group of clothing vendors surrounded by baked goods. That would distract the ladies for a while, and they wouldn't have to go too far from the wagon, so if either group got in trouble, they could send reinforcements.
If Karl sent over Remi with her last bodyguard, the two Lamia and Rae's Golems, they shouldn't have any trouble at all dealing with whatever was bothering the ladies.
Thor was too nervous to let them out of his sight without a barrier anyhow.
[You say that like I'm being paranoid. But what if they get tired, or sprain an ankle, or the straps from the shopping bags dig into their hands?] Thor countered.