The problem is the knights can't find them. I definitely think Mathilde's scouting and windsight capabilities are enough to do that in the one month an AP represents.
It's not like Bretonnia has no capable trackers, not even getting into the Damsels and the fact they can wield the lore of heavens (Divination) and the lore of beasts, but haven't had any success in years of effort. So is it possible Mathilde can manage it? Yes, but it doesn't strike me as even close to a guarantee,