Hmm... I can collab the part of the Caravan Master if you want, though if you have anything in mind, I trust that you can make a convincing argument for him. The basic of his argument is that he knows that the road will be dangerous and perilous, and frankly he doesn't trust any of you to actually protect him or his partner while they're out on the road (Also note he's drunk). He'll make a shaky claim that there isn't space in the wagon for the Lyn either, though that's a little bit of a lie since they did lose some cargo when they had to rush across the bridge. The final point he brings up (Which plays a semi-large role later into this quest) is they they will be passing another bridge over the Ravine of Demons, which not only is likely being guarded by bandits, but they may have demons roaming near by, ones who may posses or otherwise manipulate Lyn, since she's so young, and wanders if any of you will have what it takes to save or eliminate her.