"How will we exactly use the Wagons to hide her? They will be full with Cargo. I'm reminding you if you forgot!" That's the part that Confused Commander Alia the most, she is sure that Isabel can't fit in these small Wagons. She would have to crawl into a ball and would for sure have a sore neck for weeks after they get this task over with.
"They won't be until you reach Silver Kingdom! When you are there I suppose you will need to figure out how to make space for her. Or you can move at night." Although Wagons his best idea, he didn't yet think this plan deeper so at the moment he is just throwing around ideas until one seems reasonable enough to do, they need to think of this in detail before they start this journey.