Oceanus's side had three groups, with Cove, Irving, and Maren leading one group each. Each group decided to explore the lush forest to the east, the mountain range to the north, or the woodland to the west. Kyran was the only one who chose to venture toward the south, where the marshland was located.
After Kyran unceremoniously left the makeshift camp after deciding where he would explore first, the three leaders exchanged a look of disdain. They avoided choosing the marshland because there were few places to hide, and most beasts hid while waiting for an opportunity to prey on an unassuming target.
Moreover, The Council's Camp was located toward the southeast, which was pretty close to the marshland. Chances of them venturing into the marshland in broad daylight might be low, but if Kyran was caught by a marshland beast and a commotion broke out, then The Council would definitely investigate.