Being assigned to locate Orochimaru's base is not easy task and Kurenai knew this. Luckily for her she and her team is paired up with Kakashi Hatake, who is one of the few to have had encounters with Orochimaru himself.
Over the weeks leading to the mission, Team 8 trains side by side with Kakashi and other teachers in hopes of bolstering their chances of winning in an engagement with Orochimaru, should the need arise. It paranoid Kurenai to the point that she would bring Hinata into these "after training" sessions with the men just to potentially combat their captors during sexual interrogations