Since the leader of the mountain barbarians wanted him to personally visit the mountain stronghold, Ouyang Shuo obviously wouldn't refuse. That courage and confidence was something that he had. But obviously he would not walk alone ahead stupidly either.
The next day, Ouyang Shuo led the infantry squadron and under the directions from the spy, they made their way to the mountain stronghold. From the barracks, across the plains, they made it into the forest in less than half an hour.
After entering, the speed of the soldiers had a drastic decrease, there were broken twigs and dead leaves everywhere, vines covered their vision and it was very difficult to move forward. Ouyang Shuo had to get down his horse and walk. Luckily the guide had good experience and left markings on the way so that they wouldn't get lost.