It took a moment for Wanda to work it out but eventually she nodded enthusiastically with an appreciative smile. "East?" she asked, just for confirmation, pointing in the same direction the man had and then told him, "Gracias. Muchos gracias."
So they needed to take a vehicle (or rather, their bikes) and head to the East to a place with trees, so likely out of this desert-area. Satisfied at having figured something out, Wanda offered the helpful man another smile before she gestured to her companions and then turned to go and rejoin them.